There is no proper coldboothax atm, i go back to what i said earlier about a true cfw. Something that is installed like an OFW and gives complete control everytime the console is switched on, to the untrained eye it would seem no different to an OFW.
The 3ds has only managed to get to this stage in the last year with a9lh and with the current patchwork of hacks and dodgy fuckery we have for wii u atm i think its still a way off before we reach that stage.
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Therefore as its not an installable firmware file its not a CFW, its a collection of hacks that all still rely on an exploit that has to be redone every time the wii u is powered up.