Ok, so going way over sized isn't good. however, Jaka mentioned that an 8mm carb would be good for a 10x6 to 11x5 prop, which is what I typically use. does this mean that I would probably be better off going up from the stock .270in (6.8mm) carb to the .315in (8mm) carb for good performance, or as stick with the completely stock size carb as Broken Wings suggests?  I am toying with the idea of getting one of each, .270 (stock size) and .315 (one step up in size) knowing that one is absolutely safe, and seeing what kind of performance I get with one size up!

Thoughts? 

BTW, I am planning on using them for sport flying, no thoughts of racing, however, my flying style is that the engine is usually WFO 80-90% of the time.

Thanks again, Craig.