As I've heard you have to have documentaion of the Mediator and AFAIK, Mos team does not have it.
In order to run Mos on Classic Amigas you don't have to have G-rex. All you need is CSPPC/BPPC and one of the GFX cards mentioned (e.g. BVisionPPC or CVisionPPC or CVision64/64/3d) on the Mos Classic page. G-rex isn't obligatory, it is not a must.
