OK sorry tom, my complete mistake! i ment one of those vernometer things u got there at the bottom of pic, i got a few mechanical ones about the shed and that, and for some reason i thought they were also a type of micrometer.
see, i knew i couldnt be right over u mate, sorry about that
The original EGOS came with smaller bore barrels than the new ones did they? Have #39... this may explain issues I was having this weekend with breaking paint... hopefully...