There nothing really to torque it.

You said it doesn't turn, but yet you got two flights out of it.

Years ago I built my daughter a stock OLY II, when I test flew it I thought I had radio failure it turned so poorly. I put more polyhedral in the tips, (like 10"extra), she went on to win the 100" and Unlimited Jr classes at the '85 Nats with that plane.

I never had a Riser, but from your symptoms I would say the wing is too flat. If it has a metal wing rod, bend it to give you more dihedral. If it's like the OLY II, which stock turned like a pig, this will solve your problem.