I got my sticky fingers on my new to me 300 S today.

A couple of questions re the diopter sight.

Mine doesn't have the rubber eye piece , just a knurled disc. Did they come like this ?

Also the arrangement for fastening the diopter sight to the rail.

Mine has the finger screw on the right above the cocking lever, ordinary screw on the left.

Should it be the other way ? It's not fouling the lever but seems it would make more user friendly on the other side .

Does it really matter

I've got another question but its even dafter than the above two so I'm not asking it.