and why would the wings have to be 'profiled ' in 3
years since new?

Ooooh, that's a sore point for Schleicher owners -
thanks for poking at it. My -27 goes in for sanding
this winter. Spar shrinkage was starting to hurt performance.

9B

Sorry Andy... remind me to look for that if I every buy a used ASW.
I can understand the mechanical backup for no batteries on the GPS loggers..
N52AB (Original 9B) is well past time for sanding and painting on the wings.
But it serves fine as a club "transition to glass" ship and initial cross
country flying.
BT