Hi everyone I've been building up a monty 221 pr, and i was wondering whether to try out a disk on the rear, something like a hope trial disk brake. However i have heard a couple of people say that the disk mounts on the 221pr aren't that strong, but i don't know if this is true or not. So i was wondering if any of you guys have had any experiences of running disks on the back of a 221pr and how the frames held up, and whether the mounts would be strong enough to run a disk. Cheers Chris