If I go the log route what size tubing should I use for the crossover, the log and for the primaries between the flange to the log. I was thinking 2.25" crossover, 3" log and for the primaries I'm not sure. They only offer 1.5" and 2" sch 10 pipe and I was thinking somewhere in between there would be ideal. So what do y'all think? Also where can I get bent tubing big enough and thick enough for the log? I guess I just need a 90 degree and 45 degree bend, right?