I'm not sure this answers your question or not but...
I sit my crossbow on a deadshot field pod. I lay a long level across both limbs and make sure I have the bow itself level. Then, I have the scope in the rings loose. I put one of those tiny levels on the top dial of the scope. I adjust the scope until it too is level. Then, I tighten everything down.
I sit my crossbow on a deadshot field pod. I lay a long level across both limbs and make sure I have the bow itself level. Then, I have the scope in the rings loose. I put one of those tiny levels on the top dial of the scope. I adjust the scope until it too is level. Then, I tighten everything down.