I am not sure a deload will necessarily give you that bigger jump in strength. Maybe the week 5 (or 6) #425 1x2 again, you will get 2 good clean smooth reps no hitch and week 7 #450 x1x2 you get both clean!? (<Maybe reassess after this one!? to see how they go or feel!?)
I know you want to get back to where you were pre injury, (been there done that) but it might pay, to be a bit more patient and a little less aggressive on the weight jumps.