I thought he was asking what engine I just got....hahahaha
first off, Monty is a good guy at heart. Not just rc, he's a good guy, that's why I want to run for him and represent his product line, he cares about his customers.
21-4, p5x, 21-7bt, n21b.....21-4 was my favorite, great power from a dead standing idle, awesome midrange that pulled hard when needed with a endless topend that far outstretched our backstretch. I sent it to Monty at 6 1/2 gall for a general inspection. I remember him saying there was not a speck of dirt in it and how my filter maintenance was spot on.....I take care of my mills, Im not afraid to let them see 260° either.....but I DONT tune by temps EVER.....thanks for everything Monty, I look forward to representing HES in St. Louis area