All the info I have about them came from Jenny at Sew-Classic. She told me the foot controller should be rated for the same or more amps as the motor. I have two foot controllers that are rated below the motors on my machines and I haven't used them. She couldn't tell me what problems I'd have, but that the higher amp motors might ruin the controllers.
That's pretty much what I know. If you wired in that controller it might answer the question for us.
Joe