Yeah, getting involved in a guide can be a little dangerous from a legal standpoint. What surprises me though is that with all of the guides in XS and other sites, and no-one's sued anyone yet that I know of. Disclaimers don't always mean your safe from that.
I've been trying to help as much as I can as far as individual projects go, but I'm not sure I'd like to do an all inclusive 'guide' for that reason mainly.
I really like your comparo on the 2 heads side by side Fatty. It's funny how the newest revision is smaller and lighter, but gives so much better performance. I've been seeing around 10% better results.
For example, an old custom I put together, 1/2HP compressor and old chilly head with 402a, I was able to get -45 load or so. With the new heads and the Mach conversions I've done lately with 402a I'm able to get -45 or very close with the 1/3HP compressors in there. Personally I think it's down to the new head design being that much more efficient and refined.
The baker vs. the chilly? Well The old chilly and baker were pretty close in performance. One would seem to work a little better than the other in different mounts and such, but for the most part they were really very close. I have a feeling that the new Chilly1 head revision is better, but can't say 100% without a direct comparison really. Comments on the Baker was that for 'bench mount' it was better than the old Chilly head as it worked well that way, but for 'case mount' it would lose a little efficiency and the Chilly head would be a little better as it doesn't really lose in any position you put it.
That's even more pronounced now that the head is designed for 'reverse flow' as the head, and the base, will always be flooded with refrigerant and gravity has pretty much no effect at all anymore.
But from the pictures I've seen of the Baker head though the chilly head is far easier to install that's for sure. But you're right, the mount isn't quite as refined. Really though, the mount is effective, whether it's very pretty or not

and the performance of the Chilly1 head is well worth it.
I'll have to get ahold of a Baker cpu head sometime and do a mach conversion with it and 402a and the other mods I've been doing and see how it performs. I might be getting one in for repair soon with a Baker head and if I do I can get some results from that and see if the theory holds up
Cheers
Gray