Your claims seem to be a little biased....
1. You don't need guides or girdles when using self alining rockers I believe.
2. I haven't heard of anyones rockers ripping off, nor do I see guys with magnum heads and roller cams complaining or even chevy ford guys.
3. I have had no issues with measuring for pushrods.
4. I am just saying each has their own opinion and experiences, choose what you feel comfortable using.
5. Benefit of the RHS heads are they make closed chambered heads with both styles, I don't know if it's like that for Eddies.
6. Using the example of big camshafts and ripping the rockers out (even if true) shouldn't effect his decision if he isn't even going close to your definition of a "bigger camshaft".
Also I am not experienced as most in here, but I do have a better experience with the magnum stuff.