Thanks Bob. Sahak at SG Rossi USA has been very helpful and quick with his emails. I'm going to order his header and run it with a pipe.

I have a bunch of NOS Top Flite Super M props still in the boxes, never used: 11x7, 11x7.5, 11x7.75 and 11x8. I will break it in with the 11x7.

Why such a cold plug if I'm only using 5% nitro?

David