There is a cemetery on a farm owned by a family member and they desired to add a place in it for relatives that have been cremated. I made a bronze box for this and my brother built it into the surrounding stone wall.
I wanted to route out some circles in a wood table top and really needed to do better than just following a line by hand if I wanted it to look right. So, that project spawned a spin off of this quick and dirty (relatively) jig to cut accurate circles.
I didn't like how soldering was going on some sheet metal boxes so I made the jump to spot welding. I don't have the money or space for a nice stationary system so I bought a harbor freight unit and immediately started turning it into something useable.
I was making a part at work on the sheldon lathe and noticed that I had a hard time moving the carriage side to side. I took the gearbox off the carriage and found three missing teeth on the main drive gear. A slow speed gear with reasonably low forces made fixing the gear an easier choice than purchasing a new one and modifying to fit.
Existing machinery is usually a mix of off the shelf parts, custom items and modifications over time. A winch I was working on needed a small hydraulic cylinder replaced and fortunately the majority of it was NFPA dimensionally compliant. The clevis end wasn't though so I had to make one.