This very important clip on my extension ladder broke. Although the ladder was in perfect condition it was an absolute pain to extend. I removed the old clip and modeled a new on comparing it to the other side. Once I got the feel for how it was made, I went to Fusion 360 and produced a model that mimicked the clip. With the clip modeled, I exported it and printed it with PET-G on a friend's Prusa i3 with 50% infill. The result was remounted on the ladder and works well. If it breaks again I will need to consider 100% infill or thicker walls. The photos are carefully ordered but Thingaverse likes them shuffled.

Prusa i3

No

Yes

50%