Hello Everyone, Hope All is well... I'm working on a concept...I have attached my rough sketch (bad sketches ). It has two parts PART -1 (Base) and PART-2 (Top). Part-2 will slide into the hollow section of part-1 and part-2 need to hold at three different heights (indicated as stage 1 to 3 in my sketch) to carry some load. I was stuck in selecting the locking method for holding the part -2 at required height. Initially, I thought to put some pins through the holes (from all sides) to hold part-2 but I'm thinking for a different and easy way to hold/lock the part-2 at required height. These are 3D printing parts (ABS Plastic). Any thoughts/suggestions? Any kind of help is appreciated... Thank you..