Printrbot J-head Adapter

***Important notice!*** There is a slight flaw with the earlier design which causes the J-Head to wobble during print causing prints to have uneven surfaces. I have upload the revised .scad file and removed the previous design.

I made a J-head adapter for my Printrbot Simple All-metal so that I can try out the J-head series of hotends and in case my stock UBIS hotend burns out. I found out the J-head I have is about 10 mm too short and due to the Z-axis almost touching the minimum height, I