One thing I'd consider is that if you don't need the second Row Power 40, don't put it in. As long as your total current draw in the build is between 2/3rds to 3/4ths of the rated amperage of a single Row Power 40's rails, you'd probably be better off running the single power supply to both busboards. This also means there'll be less heat buildup in the case...and lots of heat + analog circuits = generally not so good, so if that's avoidable, definitely avoid it.
-- Lugia
Hi Lugia,
Thanks for your reply. That's definitely a thing, I also feel that the extra ROW power is not very efficient and it takes some hp space...but the reason for putting one for each row and not using busboards instead is because I'm using 2 Moog 104hp cases (got them 2nd hand on ebay), which basically only works using daisy-chained power modules to link them together :< I might consider upgrading to a proper suitcase-style case later.