RANS S21 Build- Ep36- Seats, Fabric Flooring, Control Stick boots 

Think about the seatbelt bolts now.

Laces forward😉you shouldnt have to trim any material, or make any cuts. I used my soldering iron with pointy tip and cauterize a hole for the rivet.

Hopefully you dremeled the small notch in the hole your rivnut goes into. I put the small notch in, plus i use a dab of JB weld, otherwise your rivnut can spin, and you wont like that, trust me!