To usb,or not to usb,that is the question.

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Hi all,building my first router,nearly finished the mechanics and on the verge of buying the electronics.I like the look of cambam for the cad etc,as this is my first machine should i go with a usb board.I kind of like the idea if this means i can design on my laptop(in the warm)then take laptop to cold workshop.Im new to this so any suggestions would be great.