I had a Hayes HFX9 on the front of my KO, was absolutely shite, no bite atall, it never slipped but , my tektro was better. Havnt had chance to use my BB7 on a trials bike but it seemed Pretty amazing on my other bike, it might be an idea to consider other hopes rather than just the Mono trials, maybe some downhill/xc/freeride brakes ? Avid Juicys? Hope C2's and M4's will give you more than enough stopping power, maybe abit over kill though...