ModularGrid Rack

i dont know if that link will work, hopefully it does

so that is what i want to start with, im pretty ignorant to the modular world but hopefully what i have made makes sense for someone

My main question is about the power supply, i dont know enough about how electrics work and am nervous about using american modules in the UK

I have an analogue solutions AS0084 case with 12-15V AC external power supply 500mA, im planning on building my own case and just using the power supply from the 0084

is there anyone out there who can give me a simple answer/explanation as to if i should be concerned with how im planning on doing this setup?

apologies in advance for my ignorance...sorry