B9,
Mate, not to belabour a point - but I learnt to fly on a TH13M/H34 then went on to fly:
uh1b/d/h
wessex
sk50
kiowa
as350
ww7/9
as355
sa365c/n
jet/long ranger
a119/109
Never had to really unlearn anything nor, in my experience, did any of the studs I taught to fly machines after they'd learnt on the uh1b or as350.
gags
E86