if it works..happy for you..but..it is not so accurate if you have not done anything in your MMIO Whitelist..
Also quirk section is not accurate..
I like Dortania guides in many parts..but to say it is accurate for TRX40 users is wrong
try to sleep/wake..or see your log (when you reboot your...
Dortania site is not so accurate for TRX40 users
I would like to suggest to read in this thread:
Here you will find how to solve your last problems
Pay particular attention to MMIO white list...
I use iMac Pro because I am using a unique config.plist to boot two OSX (HighSierra and BigSur)
I do not see any advantage to use Macpro7.1..but in Big Sur it works ;)
you have to be more specific about your initial booting error
I have no problem to build my USB with all available method