The Orca 0.3 from mendel-parts.com has a very tricky z-endstop. It's totally non-adjustable and is connected with one single tiewrap to one pole. So it totally needed a redesign to make the z-axis adjustable.The X-axis suffers from the same problems, and I will also redesign that one within some weeks from now. I'm also designing an extruder light for the dark winter days. So follow my account if you have an Orca 0.3 and want to improve it!