They both work great. It can be a little tricky getting the lens installed of the EZ mount because of the o-ring. Tip, moisten your finger and rub it around the o-ring, this will help the lens slip down easier. Let me know if you hae any questions.
Also with the Black Magic lens. FYI - if you use a HeNe beam or the piercing sensor it wont work with the Black Magic lens. The beam can't pass through that coating.