Will T, thanks for the reference to panel point. Gotcha.
Mike B, Timbeal,
yea I guess I could find one, it would actually be a 36' considering the length past the post.
Gabel, Thanks for the compliment. I like the idea of plumb purlins and possibly a beam in the same vertical plane to Xbrace.
I took your advice about the X bracing between kp's. Wrought iron, ofcourse!
Timbeal, I don't like the strut mortises above the tenon either. I think Mike B suggestion of housing with no tenon might make sense as those are in compression. Put a screw in there, or maybe some more banding.
Ken, I like the idea of the timber count, that makes sense. I have added some wings that I think would stabilize those posts some more. They are braced at the bottom 3rd. Does this help the issue?
Mike, what file extension is your analysis program compatible with? Would you be willing to plug it in?
Built these wings, for concealed space for band and engineers, electrical area, etc. Talked to my brother (sound engineer) about the acoustics.
"There should be no problem as far as slap(echo) because the open back(upstage) would minimize a lot of that. As far as monitor world is concerned it would be best to try and build a wing off of either side of the stage, space and money allowing. I'd line it up with the front of the stage(downstage). Amplifiers for the house PA are going to need somewhere to live and the wing would allow for that as well." 
