I would not have thought the dimensions would be useful for catchweight, but would be for analysing the product sales/purchases by both the quantities (kg and each) as well as value - which I think the matrix question was about. It would be interesting to see the catchweight solution, I am expecting to be given a proposal for this at the end of the week.
The matrix question was actually on a different development request I was working on. I’ll let everyone know what we decide on, just out of interest.