3D Print Vertical Logitech Superlight Mod: A Metal Housing Guide

A standard mouse keeps the palm down and the forearm twisted. A vertical body rotates the hand roughly 50-70° so the thumb faces up and the wrist sits closer to neutral. That relieves pressure on the median nerve, but it also moves the load. The hand no longer rests flat on a wide top surface. It grips the side of a tall body, and the fingers wrap around a form that must be narrower and stiffer than a typical gaming shell.

That stiffness requirement is the reason this mod keeps coming back to metal. When you rotate the grip, the shell sees bending loads along the tall axis rather than across a flat plate. A thin frame flexes under a firm grip, and the click feel changes. Engineers who have built a plastic version know the symptom: the button pre-travel drifts after a few weeks of use.

Angle is a personal number. Most builders land between 55° and 70° from horizontal. Below 45° the wrist is barely rotated, so the gain is small. Above 75° the thumb reach to the side buttons gets awkward. Print or machine two angle samples before committing to a full housing.

FDM and SLA prints are fine for a fit check. They are poor for a working housing. Layers bond anisotropically, so a 2 mm wall that feels rigid in the hand can split along the layer line when a screw boss is torqued. Mouse shells also have thin ribs and switch pockets, and those are exactly the features that warp or delaminate.

Metal additive manufacturing removes the layer-bond problem. Laser powder bed fusion fuses powder into a near-isotropic part, which lets you keep walls at 1.0-1.5 mm and still hold a thread. We have produced internal threads below 2 mm diameter this way, plus cable channels and lattice sections that cut mass without cutting stiffness. In a hand-held device, that trade is the whole point.

The catch is surface finish and cost. As-built LPBF surfaces sit around Ra 8-12 μm and need bead blasting or tumbling before they are comfortable to touch. Internal channels stay rough. If the visible shell has to look like a finished product, plan a finishing step or split the design so only hidden structure is printed.

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  Use metal forLoad-bearing frame, screw bosses, switch pockets, thin tall walls.
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  Use plastic forFirst-article fit checks, low-stress cosmetic covers, cable clips.
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  Avoid metal whenThe part is a large unloaded shell with no threads or thin features.

Rotating the body moves everything the PCB sits on. The optical sensor must stay flat against the mouse pad, so the PCB plane has to remain parallel to the base no matter what the grip angle is. Builders who tilt the whole board end up with tracking that drifts at speed. Keep the sensor board horizontal and rotate only the upper shell.

The 2.4 GHz antenna is the second trap. Logitech places it at one end of the PCB, and a full metal enclosure around it will kill range. Two workable fixes exist. Leave an RF-transparent window in the metal at the antenna location, or keep the antenna outside the metal volume in a plastic end cap. Local copper shielding can be added elsewhere if you need it, but do not shield the antenna.

Weight matters as much as stiffness. A stock Superlight sits near 63 g. A solid aluminum shell will push well past that. Topology optimization, meaning metal only where the load path runs, usually brings a metal grip back to a usable figure. Hollow ribs and open lattice do more for mass than thinning walls alone.

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  Sensor planeKeep the PCB parallel to the base; rotate the shell only.
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  AntennaLeave a plastic window or end cap; never enclose it in metal.
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  Mass budgetSet a target before design; lattice and ribs beat thin walls.
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  Switch heightMeasure pre-travel after assembly, not on the CAD model.

Fillet every edge the palm or fingers touch. A 0.5 mm break is enough to stop a sharp corner from digging in during a long session. On a vertical body the thumb side takes the most pressure, so radius that area first.

Keep wall transitions gradual. A sudden change from 3 mm to 1 mm wall creates a stress riser, and that is where a drop-test crack starts. Add a small taper instead. If the part will be anodized, remember that hardcoat builds roughly 0.05 mm per surface and can change a press-fit dimension.

Thread engagement follows normal machine design practice. An M2 screw in aluminum wants about 4 mm of engagement. In LPBF aluminum, add one extra thread and deburr after printing, or use a heat-set insert in a machined pocket. We check these details during the DFM review and flag anything that will not hold torque.

Provide a datum. Two dowel pins or a machined boss that locates the PCB against the shell saves hours at assembly. Without a datum, every unit has to be shimmed, and the button feel varies from build to build.

The usual path starts with hand measurements of the donor Superlight, a grip-style preference, and a list of features the builder wants: side button placement, cable routing, battery access. From those inputs we build a 3D model around the real internal stack, then run a structural check on the thin sections before anything is made.

For a single unit, LPBF in aluminum is the direct route. For 20 to 200 units, the economics shift. A short-run aluminum mold or a set of CNC-machined halves often costs less per part once you pass a few dozen pieces. We run both processes in-house, so the choice is made on geometry and quantity rather than on what we happen to own.

Post-processing decides how the finished grip feels. Bead blasting gives a matte, uniform surface. Anodizing adds color and wear resistance, and hardcoat raises surface hardness for high-contact areas. Laser engraving handles logos and markings, with a minimum character height of 1.5 mm.

We hold ±0.005 mm on machined features and inspect every part before shipment, with reports available on request. Uploads stay confidential, and an NDA is available if the design is not public.