Norrick, I get what you are saying with the difficulty in focusing, but the eotech as so much finer than the eye can see (under 1x magnification) and the blooming effect is, if anything, lessened with magnification as a result. I have tried putting it behind my bushnell elite 3200, and it seems to work fine...but that is a very limited trial for obvious reasons.
Fatcat, and Volt...I am wary of these cheap magnifiers as I actually originally tried to go with a Mako (7x), and it wouldn't focus past 40 yards out. I would have needed to be able to turn the focus dial all the way around at least 2 more times to get it to focus at 100 yards! Frustrated the hell out of me, and a total waste of $150.
Mike, yes the Mako I got had adjustable focus but was (as just described) terrible.
Maybe the mako I got was defective...I have read mixed reviews on it (some very positive ones). Regardless, I think I'd rather spend $200 and get something that I know will work really well. I don't mind having the regular crosshairs there, as they will provide a great set of BUIS for me. Also it will be mounted on a quick release system, should I decide that the eotech alone is more applicable to a certain situation.
I have talked to quite a few different professionals on this, and apparently this is something that noone has tried before. Seems kind of unbelievable to me...spending $550 on a magnifier seems ridiculous. Anyways, I guess I will post my results...pictures, and maybe some video!