oh and as a side note to RAS:

Wash your gliders! it makes a big difference. Ive been flying my
glider with the typical grease/grime from rigging/derigging and the
dirt and dust from sitting in the hangar, along with the patent
pending Avian Turdulators all over it. Before yesterdays flight I
scrubbed the whole thing down with some wash/wax soap. The fabric was
shiny! Amazing the difference it made in the handling. The glider
flew a lot queiter and I was able to thermal about 5 mph slower than
before. Amazing!