Hi, Citron
I need to establish a reference point before answering you question(s) any further so that I do not tred into a discussion about stuff you already know and/or have done.
Is the photo you used to start this thread your actual system or is it one that you used ModularGrid to reconstruct?
Do you have all of the modules depicted?
Does your Analogue Solutions rack have an internal supply to supply +12 vdc, -12 vdc, and +5 vdc to the internal rails of the skiff and if so, do you know the specs for the current supplied to each rail?
Is this the first time you have used ModularGrid?
These questions and their answers will be good to start answering the question you have and the big one, "How do I prevent smoking my system?"