I'm all equal parts "No Shit", "Shhh!" and "WTF! ARrrrgh"
No Shit, because Pentax owners are well aware of the quality of the glass available for K-Mount lenses, reaching back to 1975.
Shhh!, because we also know the prices are lower then anything with Canikon mounts for the same IQ.
And WTF! ARrrrgh, beacuse of this,..
This is a totally amatuerish and unprofessional to say or do this.
It takes no more the 15 minutes to correctly diassemble the lens and remove the Iris Control Lever, which is needed for use on a Pentax camera.
Do the job properly if you must remove it, then you can refit the Lever for resale.
Or better yet, buy a K-01, enjoy more dynamic range then the 5D (without Magic Lantern ), and output video that is fantastic, especially given the K-01 is now at bargain prices.