Originally Posted by drabina 
I have checked my KPR lens and I do see a pin at about 4:30. The pin is very small though. Plus there is another pin at about 6:00 position that is bigger than the 4:30 pin. I can remove the 4:30 pin but I want to make sure I am not removing an actual contact. This lens has the A setting so I assume that some of the contacts are for the aperture information being sent to the camera.
Attached is the picture with pins circled.
picture
Thanks.
the pin you show at 4:30 is actually the A settingpin. there are 6 pins and contact spots, starting clockwise about 1/4 inch from the lens locking slot. these are the apature information and A mode selection, the pin at 6:00 is the one you want/
You can remove it by unscrewqing the lens mount carefully (so the other pins don't get lost) or possibly cut it off. I don't own any K-PR lenses so I have never ddone this, but I have converted a K mount to KA mount, so I know th e pentax pin / contact locations. If you want to be sure. look at your camera body mount, and the orientation fo contacts away from the lens locking pin