I am using the CH pedals with the GP1 and it works great ! Ive flipped the
peddels upside down and propped them to a comfortable angle with an old
cassette deck and I then placed a 3 inch thick piece of wood in front of
the now upside down wheels for my heels to rest on.
The cable from the CH pedals have a female and male ends - hence one gets
connected to back ur PC and the female end for the wheel.
Jude R.