For high speed flight, what keeps the x2 type design going straight forward, if the main rotors are canted to offset prop reaction torque?
Think in terms of a fixed wing Cessna with two wing fuel tanks. One full, and one empty. You have to put in enough aileron to react the unbalanced fuel load, but the airplane still goes straight. Same as a helicopter using cyclic to balance other forces and moments. They can be prop torque, tail rotor twisting moment, unbalanced fuel/crew loading, or whatever.
Sikorsky pretty much destroyed Schweizer. Somebody bought the 269/300 type certificate and I think they are building them again. Probably with chinese parts but I don't know.