Re: Edge III bridge woes
there is an allen setscrew, underneath the trem plate, for adjusting the trem bar's swinging resistance. You can access, so I'm told (haven't had to do it, myself, yet), by divebombing the trem, and place something under the trem, like one of those block erasers (ya know, the big, pink, blocky ones), under the trem, to keep it, there, in place, while you adjust out the allen screw.
Glad to see the stretch-out of the strings helped. If it continues to go out quite a bit, all the slack still may not be out of the strings, and you may have to stretch them some more. As for the string height, that can be handled by adjusting the two trem posts in, a little. Just don't go TOO overboard on them. Try a quarter to a half turn, till you get the feel of things.
Hope this helps. Let us know how you make out.