OK, here's what I think is the final version of my plan to relocate the extruder on my CR-10 to feed filament up from below. I combined an extruder body, a relocating bracket, and a drag chain mount. I made the bracket and extruder body much thicker for strength and warp resistance so longer screws than stock will be needed. This version also has a better filament funnel on the sensor housing and a stiffener along the top of the bracket/extruder. I have not printed this to test yet but my V3 works fine so it should be alright. I hope. I'm not certain on the location of the drag chain mount, I may have to remix stevenfayer's base mount to move it into alignment, it seems his top mount is meant to sit further in than what I have but it's hard to tell.