Christy,
I'm not an X-spurt on controllers, but I haven't had any problems with the new replacement resistance controllers on any machine I've used them on. The motors have varied from below 1 amp to above it. I think a couple are even 1.5 amps.
I had an email discussion with Jenny at Sew-Classic some time back and she said it was more important to match the amp ratings on the motors and the electronic controllers than the resistance types.
I doubt that .1 amp difference between the motor and the controller would hurt the performance any.
Somewhere I have, or had, a site with a high amp capacity controller. I've been looking for it, but haven't been able to find it. When / if I do I'll post it.
Joe