I see... so it's 1/2" tubiing from the engine to the first exhaust port. Is that a smaller sized tube off the T to the second port - 3/8" or so? My knowledge of ducting makes me think my eyes are right in thinking it's a bit smaller but i'll ask just the same.

I'm probably gonna go with the Saito 1.20 in the end since I'm set on using a 4 blade prop. unless the 13x6 i have made up does wonders on my .91 test bed.

Not to be a continuing pain, but it looks like you cut 2 channels to lay the piping, am i correct on that? and second, how did you temp proof the wood in that area to the port as it looks like you have the actual copper coming out of the port at the end. do you have any heat issues?

Though I figure in time it'll give a real streaked effect from the oil and such... I can't wait.