Estes EAC Firecat #0821, Build, Part 7, Sub-Assemblies

The BT-48 tube had it's seams filled - the seams you'll see anyway. 

The front and rear of the end joint and spiral seams were filled.

The area in the center will be glued onto the balsa standoff covering most of the seam.

The raceway was painted with some CWF. While it was still wet - The Antenna was slipped into the drilled hole, turned to round out the hole then removed so the CWF could dry.

The instructions don't mention rounding any of the fin edges, but the drawings show them rounded.

After doing some dry fits I realized rounded leading edges would leave gaps at the front corners. (See inset picture) I decided to leave them square.

Here's the wings, raceway and intake/engine glued in place.

Notice the back "step" placement of the small wing tip. A very creative kitbash.