Thanks again, guys. Interesting info about the bladder tanks. Makes me think of the self-sealing tanks often used on full size warbirds.

most of my flying in the past couple of years has been balsa planes, .40 to .60 size electric. Some foam thrown in, but I quickly found balsa flies better

Got the engine yesterday, it is definitely magneto. Now that I've actually looked it over, the mechanics of the whole thing don't seem so daunting. May get an RCExcl electronic conversion kit; gonna do some more research before deciding though.