Manual Torque Converter Lockup

[the evil twin]

Can some one confirm this setup is OK. Sorry, just did it in Paint so bit average

This is just a simplest of mods

Yep, That is pretty much the simplest way to do it. I never had any hassle with the GQ's certainly (have never done a GU) and the LED was enough to remind me to switch it off.

Because the GU's will stall if you do forget you can always add in another relay from the Brake Pedal switch to disarm the circuit (same as how Cruise Control interlocks).