Guys just a thought! as I do not own a Spot , but I do have a Roo....
What I am doing is sealing the wheel wells on my Roo, using the old trick of cutting the base off a plastic soda bottle, and using this to line/seal the wheel wells stopping any air getting beyond the wells... This will definetly avoid the pressure scenerio as a concern. Its an easy fix and I am surprised the manufactures have not added simple well liners to the Spot and Roo designs... a piece of plastic or aluminum tubing cut in half would serve well also to line the strut recess.
Just my 2c worth : )

Cheers-