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.
Some things I machine aren't worth a page of their own because I didn't take enough pictures or they just aren't a large enough project. This is a page for all those things to go on.
An acquaintance was trying to get a 4x4 vehicle ready for a big trip next weekend and found he needed some axle shafts modified to complete his build. They were holding him up and he didn't want to waste the whole weekend because the regular shops are closed so I turned them down for him.