Very nice Brent. Good looking and good runner. Congratulations. :bow:
If get get a few more built we can start a club of Poppin builders.
I used cast iron for both the cylinder and piston on mine and run it with out any lubrication. I suspected that I would have some problem with rust from the moisture in the combustion products, but so far not problems. I live is a dry climate. Also there is probably some protection for the oil seeping into the grain structure of the parts when lapping them.
Gail in NM,USA