Smooth Aperture change with FD lenses

yep, i have a similar adapter and works great like that. how sturdy is yours? does it have a hard lock in and out for the aperature and how tight is the control? mine is fairly good but not perfect
 
The control feels like a damped aperture ring of a cine lens and smooth. Only snag is distance between the min and max is around 20 mm s. Not a big problem.
 
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