Even though the TRX has inspection zippers in its undersurface, enabling inspection of the cross tube / leading edge junction, I failed to spot that in reassembling it from its short-packed state for airliner travel, I had routed the right-hand side flying wire outside the leading edge tube. This effectively shortened the rigging on that side.

Launching into ideal conditions at one of Britain's premier east-facing sites, spectacular Malvern, I found that the glider was in a left turn. Speeding up -- the usual answer to improving roll response -- tightened the turn. Flying slowly conferred adequate roll control but caused me to climb in the strong lift. (Notice that my right arm is wrapped around the down tube.) Eventually I flew out of the lift and landed.