This is the source of all my angst a month or so ago about pistons.

It seems to work -- I haven't fully broken it in yet, so I may yet
discover that the aluminum inner piston swells the assembly and makes it
jam -- but I'm so pleased at how well this fits and runs at the moment, I
don't think I'll mind all that much.

http://http://www.metalworking.com/d..._blank_fit.jpg
http://http://www.metalworking.com/d...cing_crank.jpg
http://http://www.metalworking.com/d..._crank_pin.jpg
http://http://www.metalworking.com/d...two_cranks.jpg
http://http://www.metalworking.com/d...ront_valve.jpg
http://http://www.metalworking.com/d..._installed.jpg
http://http://www.metalworking.com/d..._patterned.jpg
http://http://www.metalworking.com/d...x_09_parts.jpg
http://http://www.metalworking.com/dropbox/
cox_09_piston_parts_and_tool.jpg
http://http://www.metalworking.com/d...09_it_runs.jpg

--
My liberal friends think I'm a conservative kook.
My conservative friends think I'm a liberal kook.
Why am I not happy that they have found common ground?

Tim Wescott, Communications, Control, Circuits & Software
http://www.wescottdesign.com