This site has detailed pictures and instructions for S&K mount
http://www.surplusrifle.com/reviews/skm44scopemount/index.asp
I've used the weaver rail version because i had weaver rings and they were the lowest ones - just what i needed.
I've also bought their No 4 Mk1 rear sight mount and very happy with it. Although, No 1 Mk3 (receiver mount) that i bought didn't fit well and also required some wood alteration - so i have decided not to install it - S&K was very easy on getting refund for this one.
Cheers,
Me.
