awesome post. It goes in line with advice I gave sometime back. BBSAK is a must have if you are going to tinker with your BB, especially when loading the Beta OS builds.
Every time I upgraded to a new build, I always used BBSAK to wipe my phone and do a fresh install of EVERYTHING. Afterwards, I had my service books resent and I was back online without a hitch. It was a bit time consuming, but upgrading over the previous image always ended up with conflicts after the install. Something always hung around and tossed a wrench into the virtual cog-work.