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Some Rapid prototype machines use what is called fused deposition modeling (FDM) These simply lay down a small bead of plastic material one layer at a time (think welding wire) They also use a "support" material that is used to fill empty space areas in the part with a water soluble substrate...

That is commonsly called a "counterbore" where a countersink would be a tapered hole for a flat head screw. Google counterbore, then look in the "shopping" tab. There are a few for sale that way. Of course there are countless others on many industrial sites. McMaster, etc. Have fun. Phill

Razor knife.

I've used a similar tool to pre-load a tapered bushing on the upper ball joint on older trucks. Just like you have all said already. hehe.

My goodness I love old iron. All of it. I wish they didn't put so much car dissolver on the snowy roads up here. Its pretty hard to find a decent rust free vehicle around here . . . especially one that spent its early days here. Chris, I can't say that I had the best study habits in...

Oh No! I've reached the end of the internet! What do I do now? I've been lurking on GJ for a few months now reading about various tools, etc. and I saw the spread in Car Craft and had to check it out. I've been reading this thread every day on my lunch break and didn't skip ahead at all...