I wouldnt change a thing if you are progressing Dougz
I always feel like people need to "earn" the right to do hypertrophy work, by first getting strong!! Not much hypertrophy going on if your doing sets of 10-12 in the squat with 135lbs.Stick with the basics, get strong as a bull, work on your mobility get enough protein to feed 2people and I'll bet you see more hypertrophy from that than with arnolds routine.
Read the stickies here on conjugate training, this is where your training should be heading once the initial SS gains stop.I'm not saying you need to focus on powerlifting only but just focus on getting stronger and faster on the main lifts, use your assistence stuff to drive hypertrophy gains, fix imbalances (think unilateral stuff here) and reinforce your main lifts.That simple.Oh yeah and dont forget to eat that protein BY THE TRUCKLOAD, and do your mobility and foam rolling work.
Easy!!
Eric also has some great resources listed here and at his site that IMO you should be reading before Arnolds book.