I want to attach a Arca Swiss clamp to a wooden block, attach that to the K&L rail on my MKII and then clamp it into my Death Grip tripod. I don't know how big of a clamp I would need to buy that would safely hold 12-14 pounds (extra capacity to be on the safe side). I will cut the wood block between 4-5". Possibly longer if I think I need to offset the rifle to get the center of mass near the center of the tripod.