Being either precise or anal, "polyester epoxy"? My understanding is Mosquitos
are epoxy resin, "all fiberglass" ships (i.e. no carbon or Kevlar/polyamide),
which is to say, their construction materials are typical of many first/2nd
generation "glass gliders."
The only polyester resin glider I was ever (vaguely) aware of was the (never
actually produced, so far as I'm aware) Torva.
Never flown a Mosquito, was wingtip grunt for one many times, ditto all prior
rigging comments. Never noticed any of its owners having to "fuss with" the
canopy mechanism. I believe (didn't check prior to posting) Mosquitos also
have the parallellogram stick, do they not? Always seemed like a good idea to
me (as compared to either an "S-curve" or sharply angled back one).
Other than the untimely death of Eugen Hanle and Glasflugel
not-long-thereafter being purchased-by/absorbed-into Schempp-Hirth, I've long
thought the innovative (and used for a while by Schempp-Hirth...and also
Slingsby on the Vega) trailing edge flap/dive brake was the only "fly in the
ointment" somewhat balking the Mosquito's more general acceptance. We glider
pilots tend to be SO conservative in our "what's acceptable in a glider"
views. :-)
Have Fun!
Bob W.