Hi, guys,
The vertical alignment of my R3M's rangefinder is slightly off. It's been like this right from the beginning (the camera was bought new). Sending it back for adjustment would have been to much trouble, especially as the horizontal alignment seems to be fine, which is why I decided to live with it.
However, I recently found the instructions for setting the vertical alignment, and I wanted to try and do it myself.
I removed the accessory shoe cover. So far so good.
The next step seemed not to be as easy, though. I saw the four screws, three black and one silver, just like the instructions stated. I managed to remove the silver one and two of the black ones, but the last screw is too tight and the head has started to round off. It's not completely round, because I stopped when I saw what was happening (hopefully not too late), but it's visibly damaged nevertheless.

What can I do now, besides giving up? Is there any way to remove it?
Thank you.