It's a finished project, guys. I ordered the Vortex matched ring set and the auxiliary diving board rail top for that set. Now I only have to worry about the rail top clearing the objective end of the scope. I don't think it will clear the turret if I mount it to the rear ring.
Thank you for your help.
You can get small risers and at one time someone manufactured a 45º picatinny rail top for holographic sights, I am sure someone remembers who