I've been told by two different turbo manufactures that a m7 or m8 will out climb any big bore out there, but I had a long talk with a guy who builds 1200's and he said his 1200 on mid grade would out climb a turbo m1000. He said with nitrous it would beat a rg1000. He estimates his 1200 at 240 w/mid grade and 300 w/nitrous, plus it is lighter. Any of you guys have problems with the na1200's?