Can't help with the measurements, but keep in mind that if you want to use a back stay adjuster, you might have to shorten the stay and lengthen the bridle (Randy Graves knows more details on this). I had my cb sand blasted and recoated (some industrial strength stuff called Amerlock). Make sure the tang on the cb is in good shape--I had mine rebuilt by a good welder. Sand blast and 3 coats was $180. I didn't bother fairing the cb. More hassle than benefit in my mind, and if the outfit that blasts the board can paint it right away, you won't have to worry about rust. I've had an M15 trailer sandblasted and painted, but it's been a while. As I recall a local place in Sandpoint did the work for 3 or 400 bucks total. You might consider closed cell foam for cushions. It'll be firmer, but you won't absorb any water in the event you get some on them. t /)) Tom Smith & Jane VanWinkle M15/345--Chukar M17/496--Unnamed