Use rivets for the under side. Depending on how often you take the undertray off, it should be fine. nothing a quick drill can't take off. You would just have to get a new rivet each time. They're cheap enough. Rivet hand tools are too, I have one myself, something like 10 bucks.
__________________
Check out my Albums
'13 Subaru WRX STi | '06 Porsche 911 Carrera S (SOLD) | '96 Mazda RX-7 6.0L V8 RHD (SOLD) | '09 Nissan Nismo #0058 (SOLD)
|