- my plan uses an extra T-joint under the RH fender for a gravity p-trap for catching and draining rain or excess water.
I'd be interested in seeing a sketch of this "gravity p-trap" concept - P traps are usually used to allow the free flow of water whilst preventing air flow, and not the other way around.
One of my Suzukis did have a "P trap" shaped contraption in the RH fender, which I believe was intended to separate excess water from the intake air stream, but it actually operated on centrifugal force rather than being a "P trap" and there was nothing to prevent water from being drawn in via the "drain".