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Did some experiments today and dyed acetal gears with Dylon dye. Works great. After 10 minutes in the dye the colour has good penetrations. The gears below are a dark grey and light brown. They are MOD 1 and MOD 0.5 gears cut on my laser.

Here are a couple of engines I just made. Parts are from MDF cut on my laser. At some point I plan to sell kits. http://www.youtube.com/watch?v=EjTtfQvm2r8&list=UUI26O1f6HIFAfDxMFc7cGFw&index=1&feature=plcp

I need gas jets in quantity but have not had any luck finding a wholesale source. Making them myself is an option but drilling a 0.2mm hole is an obstacle. For low volume I can turn down to a thin wall and pierce with a sewing needle. It does the job but is a bit hit and miss, not to mention...

I have to buy a bench grinder. In the past I have had one of the cheap 150W jobs but will go for something meatier this time. Question is: Would it be a good idea to get one of those wet and dry types? I need it for grinding lathe tools.

I just acquired a ML7 from 1952. It runs nicely with no rumble and no chatter when I take a heavy cut. It does not have sight feed lubricators but cups with wicks in them (pipe cleaners actually). The problem is that when I start up the lathe I get a faceful of oil from the bearing behind the...