Howdy, I'm an Aussie as well would be happy to test anything you may have been in the XBox scene since about 04 :P
Just dug my old ones out and did a full recap and some much needed TLC all operational again hehe
One idea that comes to mind if you wanted to avoid a soldering method is you could design a clip like what's used for dumping NAND on the 360 and Wii https://www.360-clip.com/
But you'd have to do it pretty well with something that can apply downward pressure constantly.
The 3D brackets are really of interest to me, I've printed a few 40mm adapter brackets for the passive heatsink on the >1.1 revisions because the GPU gets insanely hot and I've never liked that.