Thanks David.

I can see that Walther do riser blocks for this model but I'm going to have a bespoke one piece scope riser made for me.

I'd rather not have to take the rifle to the guy making it unless I really have to....it's not local.

I need to tell the engineer the precise dimensions of the dovetail so he can make the item. As I say, the Steyr riser will not fit. I'm told the dovetails of many rifles are different dimensions ...Anschutz dovetails are different to Walther for example... there isn't much in it but they are different !

What I'm after is the exact measurements of the dovetail and it's a bugger to try to measure it accurately..

Hoping someone might have the info..