I've never seen or heard of it being done to an older Reflex like this.

The only thing I can suggest is contact your local BT / Toyota dealer & ask there advice as it would be a modification to the trucks original design specification & certification.

Other then that there is the steering indicator on the dash & the 2 direction arrows to show you which way the truck will go when you apply throttle.

I do know the new BT RRE Reflex can have switchable 360 / 180 steering as 180 steering is a factory fitted option when you order the truck.