This Compact design came with new problems because of the shorten of the Jhead hotend. One that was very noticeable was the x-carriage distance to the glass, only 9 mm. Resulting in x-carriage catching the bulldog clips on the back and front of the heated bed when printing long prints. Solution: smaller clips on the sides. Another problem was that the Z-Axis Endstop needed to be lowered, this wasn't a big problem in my case because I'm using a [Adjustable Z-Axis Micro Endstop that attach to the smooth rod. I just needed to slide it down a bit. Depending on your Z-Axis Endstop, check to make sure it can be lowered enough to accommodate this compact extruder before conmitting to installing it.