Johnny are you using your WB as a NB simulator? If so how did you go about wiring it into the computer?
My NB has just blown so I going to use my techedge to simulate, it also has a function where I can alter the lean/ rich points so I can adjust stoich up or down for different fuels, or so I can target a leaner AFR
Wouldn't mind setting it up to hold 16:1 in closed loop, just to get better economy on cruise.
Also be aware if you sensor is not receiving current / drive signal from from the controller, it will not be able to burn off the acumilated carbon, which can damage the sensor. If you're unsure, remove the sensor and instal a bung until you have the pronlem sorted.
Nothing wrong with shifting spanners, so long as you have a bit of skill and use your common sence, I used one to change all my brake lines to braided, and replace the master cylinder, Not one rounded nut.