[aknovaman]

I see in the first post you refence a section on
Section A - Disable the Oxygen Sensors (O2s) Codes

Why in the world would you do that? WANABE tuners do that because its a hack and a crutch for not knowing how to tune the necessary tables to make it run correctly. Doing so can make the car run poorly when weather conditions are different than when the tune was done. They put it in open loop so they only tune the open loop AFR table and because they don't know how to tune with them enabled.

Also you fuel gage adjustment procedure is lacking any adjustment for the range of the A/D converter tables. If you change the fuel tank size, the A/D tables must also be corrected.

As you said: just blindly follow along what some knucklehead is telling us to do on the InterWebs