mrpopstar
Sparkly Dude
I missed the rest of your post!It sounds about right. If you used these rules, instead of the ones in the book, the game would not suffer significantly for it.
It does raise the question of why anyone would buy plate armor, if scale armor was just as effective and also cheaper (or easier to make), but I'm sure you have a reasonable answer for that.
Scale armor is a medium armor so would net you a max AC 17, and plate armor is a heavy armor so would net you a max AC 18 (notice light armor nets you a max AC 16). I cost the only concern, or are the AC numbers too close?