icy,
Honestly, I don't know if there are any major scratches on the sump, it has two bulkheads though on the bottom left side. You'd have to be creative to turn it into an overflow or make it a CL. I won't be able to go to the meeting unfortunately, I work, I really want to go because I want to check out Mike's (I beleive that is his name) tank.
clay, ha, I wish I still had the 636. Loved that bike, best stunt bike! I will be getting another one, stunted out though, probably streetfightered. Mine was too nice to stunt. Is that an F4i? I was considering one of those for a stunt piece, but it really comes down to what's in my price range when I am ready to buy.