Dual Extruder Radal Fang Duct with BLTouch

This is my first remix. I was unhappy with the positioning of the BLTouch sensor mount on the (otherwise excellent) LPA Modular X carriage at https://www.thingiverse.com/thing:2034743. Because it is on the rear of the carriage, about 50 MM from the hotends, I lost about 50 MM of Y-axis travel. Since I have the large bed, it was physically impossible to arrange the stock rails to regain this amount of travel.

This will also, of course, fit any other X-carriage that you choose to use, as i