thanks for the replies.
yes - i guess the turbine caravan is a likely contender, as i'm pretty sure theres no type rating for it, but you presumably cant fly it on a SEP rating (there being no pistons in the engine!)
and the turbine islander needs the MET class rating then?
also - the piper malibu (the piston one, not the turboprop) has its own rating of some description doesnt it? cant be flow on a SEP if i recall...
i'm not a spotter - honest!!!