I see what you mean about retracting into the fuselage. I also looked at the thread found by wildnloose, nice find. A full blown ARF bash for sure, gear doors and all. IMO, not a project for a nubee to retract installs, but with enough good info (not enough in the thread as noted), I guess it could be done by a good builder with mechanical skills. It sure would look good in the air though.