[waynne]

Thanks for posting that up k16eof an interesting problem the loss of power at the top end.

2 ways to smooth -
1 get an orbital sander in there or do it the hard way by hand.
2 Get a sheet of sticky film (like the fake carbon fibre strips) and lay this inside the air box.

(Don't forget to smooth out the top half as well! Get rid of all of the dust generated as well - you really don't want plastic fragments burning/melting inside the engine.)

I like the window deflectors, where did you get them from?