The Infinity 1 has 3 plys of Kevlar on the bottom of the fuse (as does the Berkut) for damage protection in the event of a gear up landing.
The two PIAs are cutting it and sanding it. Kevlar shears will get you past the first on and a final layup of glass over the Kevlar will get you past the second. Kevlar has a tendency to fuzz up if you sand it. I've also read where a very fine grit sandpaper will help avoid this as well.
T Mann - Loooong-EZ/20B Infinity R/G Chpt 10 N200LZ
Mann's Airplane Factory
We add rocket's to everything!