Split Keyboard Tenting Riser
A 19° tenting wedge for one half of a split ergonomic keyboard (Corne, Lily58, Sofle, Iris and friends) — 88 x 74 mm footprint, 11 mm at the inner edge rising to 42 mm at the outer, with a 4.6 mm lip so the board can't slide down the slope and an open notch for the TRRS/USB cable. Two M4 brass heat-set inserts (5.5 mm bores, in the bottom face) take M4 bolts as screw-adjustable outer feet, so you can trim the tent angle by a few degrees; the body is an open egg-crate frame of 4 mm vertical ribs, so it prints without a single support and carries the load along the layer plane. Print two — flip the model for the other hand.
desk keyboard ergonomic riser