E3D V6 adapter for Metal Plus

I just completed mod to my Printrbot Metal Plus adding the E3D V6 hotend. While doing this I tried using this adapter http://www.thingiverse.com/thing:559657 but kept having trouble. Then I found this one http://www.thingiverse.com/thing:822790 by FooFighter94 but it didn't quite work for me, it was too long. So I took his and removed about 5mm from its overall length. It now works pretty good on my Plus. About the only thing different I am planning is adding about a 2 mm adapter to drop the par