Snakehips, that's kind of what I thought you'd say and after already blowing my old Combat motor 3-1/2 yrs ago which wrecked the cases, one rod, Maney ally barrels and both No 1 valves I don't want to go through that again. It even bent the LH frame rail and it took me a while to figure after the rebuild with good 850 cases why the front ISO bolt had to be forced into place...it was over 1/4" out. That made it vibrate like hell. They are Commandos after all so unless we've got 000's to spend on HD cases, crank and rods and 1000cc conversions we just need to accept their limitations ! Cheers.