Reverting Transform (modify) Bone to Starting Position

I’m trying to do a Turret that rotates using a modify bone node, but I want it to revert back to the original (facing forward) position whenever I release the aiming button. Instead, when I aim again, the cannon goes back to it’s last position.

Is there a way to reset a modify bone to a starting position, after releasing the aim?

Currently, I’m using a Blend Poses by Bool (because I don’t know of any other branching node in Anim Blueprints) to force the rotation back into a 0,0,0, position. This forces the “auto-rotate,” but the issue of aiming taking the modify bone back into it’s previous position continues.