Frise ailerons on sailplanes

I guess it's too long ago for people to remember the
Olympia 4 series, from the 401 prototype, flown by
Bill Ivans for the US team in '56 at St Yan, to the
465 flown in '65 by the Brit and NZ teams at South
Cerney.

They all had Frise ailerons. The 419 had far nicer
ailerons than the contemporary Skylarks, although the
aileron leading edge shape was critical for balancing
control forces. They all had bungees to increase
aileron 'feel', and the position of these was different
in each of the 4 examples I flew.