I do the same, except I plow forward mostly. Eaiser on the neck, and the snow doesnt seem to care if you run over it.
I dont know how it would work since the back blade I have is swing only. IF you had a blade that would float ie one with a adjustment on it to drop either side, let it float. Not put a pin in the tip adjustment, just in the swing to get your angle. I think that would work better.
Just pull your toplink in so the blade isnt cutting, fairly strait up and down.