Hybrid roof frame design: trusses and sticks

Here is what the sticked roof might have looked like, if I had an inside-walls arrangement that could have contained the posts for getting the loadpaths somewhat centralized. I did not.

The posts you see get the loads into some upstairs walls, but there is no place to go from there. A truss scheme became necessary.

The solution using trusses is possible because of the large amount of overhead between the vaulted (or flat) ceilings of the central and under-gable rooms.

Across the short span of 37 feet go three-ply girder trusses, spaced in about 12 feet from each end. They look pretty much like this.

With the big girders up and braced, the center is filled with spanners that have scissors bottoms where they go over vaulted ceilings. The xray view attached here shows what is going on.

The overall truss scheme is shown in this pic, and you can see how the 12x12 valley area in each corner is stickframed.

Sticks are 2x12 rafters on 24 centers, with the valley being a two ply sandwich of 11-7/8" LVLs.

Thanks for your comments, James.

I have a solution, and it is as I showed. I rejected everything "stick" because I realized I had no post-down opportunities in the center area that could result in load paths straight down to bearing.

Why should I reconsider anything in that central cruciform area that's sticked, seeing as how, a.) it cannot be adequately supported, b.) there is a great solution and it involves trusses, and c.) the trusses eliminate the need for most secondary ceiling framing?