I like the current sections myself, topic based, IE test equipment, repair etc.
MAYBE just adding a brand subsection under each of the categories, such as Repair/Fluke, or Repair/Datron etc.... that way the current main topics are left alone without mixing up the topics, and it adds refinement and easier browsing to items of interest.
Technically there is no cost to doing that. The problem comes about when people start (rightly then) wanting sub sections under every major category.
It was done for the CAD tools way back becauase it seemed appropriate. But the concensus seems to be people not wanting that elsewhere on the forum