Tripod mount Canon Type A II fitting EF 200/2,8 L, EF 80-200/2,8L, EF 200/2,8 L, EF 70-200/4 L, EF 70-200/4 L IS, EF 400/5,6 L USM.

Added main bracket with integrated Manfrotto plate into part.

STL-files include support to remove after printing.
Install M6x25 with M6 lock nut in the knob turning the nut the "wrong" way on the bolt. You may need to heat the bolt/nut if fit is too tight.
The brackets are joined by a M3x16mm Allen head bolt and a lock nut.

There are no threads in the holes so drill 5-5,3 mm for the M6 (knob) and the same for the 1/4" for the tripod thread. Then make threads with appropriate tap. Or, si