Return of the 15,- Pentax 6mm 1.2 (a succes story!)

grind down more on the side, as shown in picture

Ever since I bought my Pentax 6mm 1.2 cctv lens, I have not been able to focus on infinity. I paid someone €20,- to shave down the rear barrel of my lens but to no avail. I started grinding my c-mount adapter but that was not succesful either.
The problem is -and I know other buyers are struggling with the same thing- is that you don't know exactly how much to grind down of the barrel. People didn't get it and I didn't, either... It's not that the person who 'discovered' this cheap wide and fast lens, Seb Farges, wasn't helpful. He shared pictures of the mod but he was not able to explain exactly why simple 'shaving off a few millimeters' didn't work. But then, upon close examination and with the help of blogger Obakesan I finally noticed what I was supposed to do: shave off the outer side of the barrel a few millimeters more, untill you reach the screw on the side.
I bought a €35,- Dremel (electric tool) to do the job and after a few rounds grinding down the barrel... tadaaaa! Infinity! I am infinitely happy with the results... I will post some footage I shot with the Pentax soon. (Note: this is not a dirtcheap lens anymore: 15,- for the Pentax, 2 c-mount adapters@ 19,- together, 35,- for the Dremel... But the Dremel is a lovely tool: I used it to slice through metal today and it lived up to the task!)

GH2 AND PENTAX 6MM 1.2: TOGETHER AT LAST!

This is the drill for my 15,- Pentax 6mm 1.2

THE DREMEL: IF THIS DOESN'T WORK, NOTHING WILL...

I cannot get my Pentax 6mm 1.2 c-mount lens to focus on my Panasonic GH2. I am stuck with a fixed focus lens while others have been able to shoot good stuff with this wide-angle, fast lens I bought for €15,-
I am going to give this lens one last shot and bought a Dremel (mini-drill) that will help me modify my lens even further. I have instructions from people that have been succesful at getting infinity focus with comparable lenses... Either I'm going to shoot some lowlight, wide angle stuff pretty soon or I'll be stuck with a handfull of scrapmetal...

PRECISE INSTRUCTIONS FOR MODIFICATION