Very interesting in that this engine has two totally separate boiler / engine systems with no pressure equalizing crossover, so they are only tied together by being on the same crankshaft!
I may well agree with Scott's recommendation, and even second the motion, but first I'm going to have to decipher whatever the heck the second half of his acronym means .... guess I need to brush up on my code breaking skills!?!?
In any case, that was one fine video production you have provided for us here Charlie .... Well Done!!!