I only pull from 2-4 categories. And your archive polling already tells you which subsets individual users access. It would be a cinch to give each user a shared UI and then a subset of the product archive that pertains to what they've recently used. I've seen apps do that very successfully.

So I am ALWAYS where there is bad cell service. There are mansions being built at the outskirts of society in the hills and where there is basically nothing. That seems to be where I work most often.