I used to build diving compressors (in the 60’s and 70’s). I used mostly the 4 cfm surplus kiddie and the 2, 4, and 6 cfm Cornelius units. I still have a beautiful 9 cylinder cornelius radial unit sitting unused I purchased back in the 70″s. I am hoping to find a schematic breakdown of the 4 cylinder Kiddie compressor. I recall that the pistons were not connected via rod to a cam rather than the conventional crankshaft with rods and pistons. I’m doing some design work on a difererent dype of system and would love to be able to obtain a schematic breakdown of a 4 cylinder kiddie – most specifically of the crank to piston parts and configuration. If you might have anything like that or a source of same, I would sur appreciate your asistance. Thank you — Mike C.