I went ahead and ordered with an R41. I am looking forward to trying some older and even vintage razors soon. I want to compare this new one to any older ones I can get hold of.

My R41 arrived from WCS. First of all, I ordered it on Saturday and it arrived today! Whooley Cow what service!!

Anyway, I took the calipers to the razor as soon as I unpacked it. The cap is 18.78mm. I am confident it is the 2011 version. I put a Feather Blade in it and took it for a spin. My oh my this thing is amazing... Super careful, super slow, and no weeping OR bleeding or tears... I love it! I can't believe the feedback thing thing gives. The day I'm ever tired or in a hurry I'm gonna be in trouble..