Is it really so you cant have your techmarine join a squad of Tactical Marines prior to the drop?? How silly is that? This is about the only use for this guy I can think of. With the Servohanrness he'd be a cool addition to a small tacsquads punch, both shooting and assault.
How about a Chaplain joining a squad assault marines wishing to deep strike?? What are the "official rulings"? My gaming group uses too much common sense for tournament legality