John, good job on these rules. When I got d20 Future, Power Armors were the first thing I looked for (that and mecha) and I was dissapointed not to see them. Then later I saw how they treated power armor and I was like, eh, it works but it's not what I had in mind.
I like the rules above. Are you going to release them for sale? If so, I'll use these in the interim and credit the OGL with the purchased release. If not, then let me know how to credit these in s.15.
I have a question: how do these rules behave next to the mecha rules? Meaning, how does a power armor user fare against mecha? What's the pro/con of a heavy power armor vis-a-vis a large mecha? You see, I tried doing something similar to what you did above, but everytime I tried what I ended up with was something that was not worth the trouble over getting the smallest size of a Large mecha (8 feet) and building it from that. So I'd be curious to know what's the relationship here between these two similar pieces of ordinance before I get cranking on my d20 Future releases (hint, hint).