I've heard the Genesis has a rather narrow speed band between stall and
best L/D and the polar falls off rather quickly after that..

I haven't been able to locate a polar for the Genesis 2 on the 'Net, but
looking at http://www.nwinternet.com/~blanikam/...is2-glider.htm, there
seems to be a respectable difference between the stall speed (36 knots at
5.6 lbs/sq ft loading) and best L/D (43:1, 56 knots, 6 lbs/sq ft loading).
Is that reasonable?

-ted