I ran my Speed .61 with a Dynamix carb today - a very easy carb to set up - and gained a few rpm: 13,044 with an APC 11x7. It's a rebuilt engine with a fairly new ring, so I'll probably get a little more as I continue to run it. That's actually a bit stronger than my Tower Hobbies .61 which is supposed to be one of the more powerful sport sixties.

David