One last point, most of the gliders that use the FX 67 series start with 67k170 17% thick, then at some point,
either from the root or the taper change at the aileron, transition to 67k150 15% thick at the tip.
This means that special care in needed to calculate the templates for intermediate stations.
My DG200 is 67k170 all the way. The 40 year old wing is very accurate still, something that cannot be said of
the PIK20 (one locally is 19% thick) the Mosquioto, and the Mini Nimbus, all of which seen to have suffered moulding errors.
As I recall, the reprofiled mentioned previously required special calculations for each individual aircraft.