I just installed a set of XT M-8000 brakes on my Stache, I used the "no bleed" technique when shortening the lines. Just pull out the block from the caliper, pump the lever a few times to push the pistons outward, install your line into the frame (I taped over the end of the line after removing it from the lever), cut the line to the desired length, re-attach the line to the lever, push the pistons back out, you should have a firm lever when you're done.