At the top of the BITOG page as I type right now is an M1 ad. What bugs me is that it shows an inline-4 crankshaft, rods, and pistons, all moving in slick animation... BUT THE MOVEMENT IS WRONG!! The pistons are moving like an inline-4 TWO STROKE engine would (ignoring balance), not with the inboard pistons moving in sync, and the outboard pistons moving in sync and opposite to the inner pair like a 4-stroke gasoline automobile inline 4 would. It also bugged me when one of the oil companies ran an ad on TV showing a 4-valve head with valves and springs, but all 4 valves moved in unison like a Detroit Diesel 2-stroke might. Yes, I'm easily bugged. But then I read BITOG so we already know I over-think things, right?