First, the handguard unless it is touching the barrel/not free floating is a non issue. You aren't aiming with the handguard so the .1 offset is of no consequence at all. What matters is aligning the bore centerline with the optical center of the scope. That alignment is controlled by the location of the base mounting screws in the action, and the straightness of the base itself. It is unlikely but is possible to bend a scope with the rings but I doubt you did this. However, try tightening the ring screws in a different order, you want to do this like you do lug nuts on a wheel.
If you really want to fix it right, have the base mount holes enlarged to 8-40 screws, but the smith needs to be careful, because a tap will just enlarge the hole without moving the center...they really need to move the center of one of the holes to truly fix it. You are not off very much so it is up to you whether this is worth it.
Other options....you can buy windage adjustable rings, they are fairly common. You can also shim the inside of a ring using a piece of aluminum from a coke can, or sacrifice a feeler gauge.
Frankly, considering you can still zero with some good adjustment left, you may just want to shoot it and not worry about it. I dont know anyone who dials windage for wind, they hold it using the reticle.