Nice model! I've tried a few different kinds of this thing, and this was the first one I saw with the idea to just use an actual hex bit. Great way to solve the layer line / strength issue! I used an old slotted bit, cause who needs those, amiright? The fit was pretty tight, but I just heated up the bit a little & pressed it in with my vise. Looks nice and works great! Thanks for sharing.

Works great! Smooth movement, very satisfying.