Finally found a couple of pictures of this neat little engine. Makes me want to build one myself. A popular engine. If you go to Youtube.com and search for "Open Column Reverse", you'll find several other versions of this engine.
Place cursor over any picture for more information, if available 0 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56