I am going to go with the Dynon pitot tube since it will work with multiple EFIS's. I have looked around to get ideas on how to mount the mast but I was looking for some clarification/ideas.

I was planning on gluing in a 4ishx4ish piece of plywood between a rib and the adjacent false rib and reinforcing appropriately. From what I have seen the mast mounts to this "pad" but a question I have is....does it go in from the top of the pad? In other words, do you install the mast through the inspection hole after the covering is done? Obviously the "pad mount" would have the hole cut prior to covering. Is there a cover that goes over the mast afterwards to "sandwhich" the mast mounting flange to the mounting pad?

Any pics, mast recommendations, suggestions would be appreciated.