I am currently laying out my interior for my PA-14. I am considering using .040 aluminum for the floor back through the original baggage area. This is what the old floor was made of and it worked well, and made it easy to have access panels for servicable items in the belly. I may use .060 Kydex for the floor in the extended baggage, .040 Kydex for the lower side panels, and .028 Kydex for the upper panels in the extended baggage. The old interior was .020 aluminium but Kydex seems like it might be the way to go. I am also considering a open extended baggage area by eliminating the shelf for the upper baggage. My thinking is that it might be easier to retrieve items back in the extended baggage. Is there a pitfall in not installing a shelf in the extended baggage? I am looking for that magic balance between weight, strength, ease of care, and cost. Suggestions and experiences would be appreciated. I have searched the site for all the relative information and need to make a final decision and then go get materials.