Hey, if it's stupid and it works, it ain't stupid!
I'm sure the way you have it set up, with the added weight of the drum in the center, it should balance and handle quite comfortably.
Call me old-school, but my '74 (my only AK) is set up like a good ol' first-run AK74, just like the ones the men in my father's generation carried in the middle east durring the 80's.