Walther GSP trigger adjustment

I have an older GSP set. I have both single stage and 2 stage triggers for it. I have located the trigger weight adjustment screw for the 2 stage (from drawings online). I've been trying the old single stage lately (which I seem to prefer) I have the walther schematic for the single stage trigger but I can't find which screw adjusts the weight of pull (I think its set for the old 1360 gram rule).
Any other advice on adjusting these triggers would be welcome too (my 2 stage feels "gritty" in the first stage).

You might try calling Earl (Earl’s Repairs), he is authorized Walther dealer and I have found him extremely helpful over the phone.

http://www.pilkguns.com/tenp/spwalgsp22o.htm

Bubba;
Thanks for that - just what I needed !