Brad,
So if I understand your follow up question, you are asking how we wire the hot and neutral into each of the filters? I guess I didn't catch that part because I was think you wouldn't want to tie all the hots and neutrals together on the output if you want isolated filters, but neglected the input pat.
In mine I did a star like configuration for hot and neutral to filters as well, branching off a common point to each of the filters. One could also use a bus bar, isolated from the chassis. There is a mild chance that you might have some HF interaction if the bus were too resistive, but I'll defer to someone with experience in such.