I've been wanting to do this for quite some time and finally installed a ZX-GR 27". I like the draw a heck of a lot better, smoother and not jumpy like the original. I still got to do a little twisting to get the ATA right, it's 1/8" long. The BH is a 1/8" short at 6-3/8" which is fine by me. I liked the 6.5 before the swap, I like it a lot better now.