[Aaron]

Next Problem:
Yes the windscreen is normally made with the bracket that the rain and light sensor clips into, and naturally along with that is a paint “mask”.

I’ve started fabricating retaining brackets and confirmed that the cover plate also holds some pressure on the back of the sensor.

The later “round” sensors used for the next generation Fiesta and Focus have a retainer that is available from Ford and as such would be a better choice if they’re electronically compatible with the GEM in the XR4.

There’s even a retrofit kit available.

Anyway for the moment I’ll use DS tape (well 3M bonding pads) to affix my brackets to the screen. The bracket system and the metal retainers need to press the silicon face of the sensor against the glass.