Steve,
Sorry, been busy, but yes you got it. With top electrics OFF and bottom electrics ON FULL, and wingtip electrics on 1/2 and Rotax on FULL there is still 1:1 thrust and about 900 ft-lbs of thrust pitch UP moment available (plus aerodynamic pitch up from elevators). It should pitch up to hover relatively easily. There are two throttles for manual flight, one for electric and one for Rotax. Yes there will be a auto transition mode. Electrics don't even come on until slow speed (fixed pitch props). Multirotors come down very quickly and very stable with a good controller, not like the limitations of the 1950's tail sitters (all manual control).
Glad you are thinking about it

Dale