Gave firewall seam to upper fuse a wake up 36 grit, then 80 grit scuff sanding, then 4 BID layup.
Worked out well laying up 2 BID at a time in 3 pieces each.
Drew visqueen laying at a 45 degree angle on front of fuse, then drew line 1" above and below. Was able to bend BID and tape to plastic.
Fit was great.
Y9-05-03