I have a PPL(A) SEP, and am currently enjoying differences training on a flexwing (GT450). Its taken me a few hours to get used to the reversed controls, but I don't anticipate that once I'm 'signed off', that changing types from flexwing to (A) and back again will present any undue problems. (Not any more than, say, flying nosewheel/tailwheel/nosewheel aeroplane types does, once you're competent).
I'm enjoying all the delights you describe, and more.
Cheers,
Andy