There 3 errors in the laser cutting of the Perky parts, they are:
1- the trailing edges are 1/8" to long at the center line.
2- the rib R-1 should have 1/16" removed from the top and the bottom.
3- the bottom of the firewall is 1/16" to large and should be cut down.
This is an official notice. I have a cal into the laser cutter now but some changes may not show up for a while so when starting check your parts.
Larry
Black Hawk Models

          We have made corrections on these items and the new Perky kits no-longer have these errors. I regret any problems that any of our customers might of had.
Larry