Goggles X extention module holder

This is a remake of the [Walksnail Goggles X Extension Module Mount](https://www.thingiverse.com/thing:6918046).

It is made to mount [Caddx extention board](https://caddxfpv.com/products/goggle-x-extension-board) on top of the Goggles X.

The original version wouldn't fit my SpeedyBee analog module so I had to lower the walls a little bit.
The fit to the goggles wasn't perfect so i remade that part. I also swapped the joint so that the female dovetail is on the goggle part. This was made to keep the goggle part as low and clean as possible for all those times when I don't need the module mounted.

Print with PLA or PETG.
A layer height >0.2 gives the goggle part a really nice fit.
Supports needed for the module holder but not for the goggle part.

They have a tight fit. Let them slide on and off a few times before connecting them fully.