Hy Steve:
This is the big thread you want to read
http://www.rcgroups.com/forums/showthread.php?t=908112
I posted some buiding picutes on page 16 gray savex.
If I have to build one again will go MINI on all surfaces exept ruder since a standard servo is easy to glue inside rudder. Tams Jet Retracts with foam wheels.
The trhust tube is hard to get in and get out.
Keep it light as it has a tendency t bunny jump on landings ruining the retracts.
Cheers
Juan