I've been using my 3 axis mill for about a year now and have made quite a few things on it and made some money using it to. All in all its been great.

But I've yet to really machine anything that needed to be precise..all the stuff I made was more "shapes" then surfaces that interacted or assemblies with moving parts. By precise I mean accuracy of 0.0005 or below.

I'd really like to start making precision things, just for fun, and to improve my setups and fixturing methods.

Whats a good project for this?

I like the idea of gears or things that need bearings and do something.

Perhaps a right angle head for the mill, attempting to get it as precision as possible? I dont mean making a commercial grade one obviously..but however close I can get.

This is also a good excuse to buy precision measurement and other related tools so I can actually prove things are correct lol

Anyone else feel this way?