J-Head adapter for interchangability with E3D adapter

https://www.thingiverse.com/thing:722011
Did you use this E3D adapter, so you could fit your E3D hotend into your MendelMax?
What if you want to swap between J-Head and E3D relatively easy?
You need a J-Head to J-Head mount adapter which works interchangeably with the E3D to J-head mount adapter! That much is obvious, right? Then this item is for you!
If that didn't make any sense, you don't need to worry, you don't need this item :)