Matt Duclos is one of the top cine lens guys in LA. He cine-modded a 1978 Leica 21mm Super Angulon for me. The workmanship is impeccable. I had an issue with the Leica lens when used with an Arri MMB-2 and MFF-2 and he went out of his way to help me solve the issue. Totally great guy, great service and workmanship.