...so the BC-250 worked out fine. Funny stuff really. I bought it as I wanted a PS5 chip for geek value, but since I was overseas at the time I didn't do anything with it, came back and loads of smart people did all the hard work for me. It's now pretty much a case of "install Bazzite and use Steam"... all you need to work out youself is how you're going to power and cool it. Which is where I'm at. If you can find one cheap and have spare power supplies and or a case I suggest getting one and giving it a go! Although now that the word is out that they are a bargain they are becoming more expensive.
My next step is printing a bracket as the packing foam is just a "does this even work?" placeholder. Then I can use it as a random gaming and Linux box. Fun times ahead!