...
- Use a flapper wheel to sand the inside of the phenolic tube instead of doing it by hand
- Have at least three people to help with the tube layup
- Support the fin more securely while machining the G10 tab so that the phenolic leading edge is aligned with the fin (see "Hermes 2 Fin Design")
- Make sure the fin can jig for the root bond is properly sized so that the fins are straight/evenly spaced
- Taper the carbon fiber cutouts only at the trailing edge
- Make sure your laser cutter is large enough for the cutouts
- Make sure the vacuum bag is properly sized (not too big, not too small)
- Position the fin can vertically, not horizontally, so that the fins don't splay under the weight of the fin can as the epoxy softens
- Have a buddy when doing the oven cure and work in shifts
...