String / wire end stop

I needed to fix a curtain in my camper, seems to work for me. Don't mind print resolution, I didn't want to wait so it is 0.20 rough surface. And yes .stl is not smooth af because I'v used a free version of Shaper and export is only in low resolution:( If only Fusion 360 was available for iPad Pro ) but it doesn't matter in that size:)