The core modifications are the customized rear wheel & cassette; an additional dropout; rear derailleur with oversized pulley wheels; and the LTWOO AE set.
If you want to know any specific part's details, I would like to explain.
Let me ask which derailleur you used and did it come with a hanger? Did you have to modify the hanger? Did you then only change out the pulleys to larger ones? I am trying to make a list of the parts needed and their cost.