I fitted a Rowan Extra Setback blade to a 77 in a CS800 stock and I think it's a bit too far back. As part of the trigger mod, moving the pivot point did help slightly but I think it's still sitting a touch too far back. Perhaps a regular Setback blade would have been more suitable but I'm fairly used to it now so won't bother changing it back. I think in a normal stock it might feel more natural.