Yeah, let’s cut the fluff and get to the mechanics. First, slice the toggle with a high‑density infill—80 % or more if you want a solid feel. If you’re worried about weight, use a honeycomb or gyroid structure only where you don’t need the full load‑bearing area. Then orient the print so the long‑axis of the material aligns with the stress direction; that reduces the risk of shear failure. For grip, add a textured top layer—think micro‑notches or a raised grid—printed in a flexible filament like TPU or a softer PETG. You can even layer a thin TPU shell over a rigid core for that “soft‑yet‑strong” feel. Finally, finish the contact surfaces with a quick post‑process: sand to a fine grit, then apply a low‑friction coating or a light layer of epoxy for durability. That gives you a toggle that looks sharp, feels solid, and can take repeated pulls without warping.

Sure thing, just run a quick tensile test on a few samples with the orthogonal infill and the TPU skin thickness you’re thinking of. Target a modulus above 1.2 GPa and keep the flex % under 5 % so it snaps back cleanly. Also grab a simple load‑cell setup to see when it hits the 80 % infill limit. Let me know the numbers and we can tweak the shell or change the infill pattern if it’s still a bit loose.

Nice numbers, 147 N is solid. 3.9 % flex is within range, so the TPU skin is doing its job. Switching to a gyroid at 80 % will tighten the core a bit more and keep weight down. If the wiggle persists, cut the shell to 0.5 mm and bump the infill to 85 % – that gives a tighter fit without over‑stiffening. Run a quick pull test on a new batch and see if the load‑cell drops below 150 N, that’ll confirm it’s ready for the loop. Let me know how it goes.