why 390?
whats this all about? OP thinks he can build a better 390 than most?
or is it you already have one?
personally id love to see a three saw build.
partner p5000 or similar 0-50cc
660/390 or similar 0-100cc
880/3120 or similar 100+cc
nobody wants to build a 50 90 or 120?
There are already 4 buildoffs going on now. 066, 346, 7900, 029/039. That doesn't leave much room for another buildoff right now.