I've been asked a number of times about mounting the TP Accu Draw on an Excal crossbow. I mounted one on my Excal Vortex and it works great. The Accu Draw is supplied with detailed instructions, with templates for drilling the stock and instructions for mounting procedure. The underside of the scope rail needs to be cut to make clearance for the cocking "sled" and the sled hook must be shortened for the Vortex as pictured below. The Ten Point Accu Draw, IMHO, is the finest crank type cocking system on the market and makes a very nice addition for folks that have difficulties using the cocking rope due to recurves' high draw weights. This modification also makes for very easy string changing. You'll notice the notch still can be used for rope cocking if so desired.