This was a fantastic review, thanks for writing it. I was very excited to learn more after you had mentioned it before. However, I must now bring on the avalanche of questions

NP. Bring 'em on.
Stability. Did you find the unit stable - particularly with your very large display?
The combined weight of this:
http://www.simhq.com/_technology3/images/technology_173a_003.jpg is around 120 lbs
The weight of this:
http://www.simhq.com/_technology3/images/technology_173a_001.jpg is around 20 lbs
The weight of the flight sim package:
http://www.simhq.com/_technology3/images/technology_173a_002.jpg is around 17.5 lbs
Sitting in the seat with the weighted monitor it feels very stable to me. More so than many other pre-fab cockpits I've tried at E3 for more money. Since it is sitting on the floor rug, I may put 3-4 small strips of velcro on the bottom of the rails since it sits directly on the floor to make sure there is no slipping around. I haven't felt any, but I haven't been in a big gunzo yet either. Feet would not be a good thing IMO so I'm glad they were not part of the design.
On the same subject of stability - did you find that the flight sim side units had any flex when you were using them? I had a concern of those side units not being stable as I cranked my stick and throttle around. This is particularly interesting to me as I may just get the Warthog and I imagine that it will take more force to move it than my current CH Fighterstick.
The L-shaped mounts once tightened down to the side rail might as well be welded to the sides. They are not flimsy. The arms the throttle and stick sit on are not flimsy and once tightened down with the knobs are rigid. Any movement is from the velcro on the bottom of the controllers. Not a lot, but some flex just because its velcro. I'm looking at a more permanent solution to report on next month. Ideally I'd like to bolt the
HOTAS down to the outboard plates.
Can you tell me the distance that your stick and throttle are apart now - how wide I guess I'm asking. The fact that you have the same hotas setup as I do is perfect for comparison.
25" from center of the left bracket to center of the right bracket.
You mentioned that there is a small movement in the keyboard tray when using it. Can you elaborate a little more on that? Does that mean flex or something else. Did you find that impacted your use of the tray at all?
Movement... yeah the keyboard tray, by nature of it being mounted on one end or the other, has flex. The keyboard panel itself is not lightweight. Matter-of-fact, it has an under structure of welded channel tubing! It's steel and not some cheesy fiber board.
Other thoughts and variations on the keyboard/mouse tray... I'm thinking that center section of the tabletop would be a nice place to mount a small keyboard. Or, I could see some players getting a second keyboard bracket and dropping the left and right side into the L-shaped mounts, then lifting the entire thing up when done. Or, imagine the acrylic tabletop not being attached and instead having the keyboard tray there bolted down instead.
Here is a video SRT did on it. It's a racing setup, but note their comments about the tray and seat. A caveat though -- the monitor mount they are showing is an old design not used any more and was not as stable. The new one, as in the review, is very stable. IMO, it made the whole thing more stable. They also didn't use the tabletop which adds stability. Advance the video to the 28 minute mark.
http://www.youtube.com/watch?v=KCQgfCgSueMIt also looked like you mounted your second monitor on the one side of the tray as well. That suggests to me that there isn't as much movement as I fear.
The 17" Envision is just sitting on the turned right side of the keyboard tray. It may or may not stay there. I just thought it would be good to show the tray can handle that kind of weight.
How far when you are sitting comfortably is your eyes from the screen? Is it about 36" or so?
Yes, 36-38" from the screen. But keep in mind that is dependent on where the seat is positioned fore and aft, angle of the back of the seat, and which monitor is used. I personally can't stand being too close to a monitor -- like at the theatre in the first row. Don't get that with this setup.
It sounds like you are wide-shouldered like I am. I was concerned that that seat might cramp my shoulders (those horn-like upper bolsters). I was concerned that my shoulder blades might rest uncomfortably on those rather than the seat back.
It feels great around the shoulders to me. I know what you mean. I have had that problem in other cockpit seats, but not this one.
You are about my height. Does the seat support your head at all if you lean back?
If the seat is setup more, yes. Less so when it's tilted back. Probably my bad posture.

I was surprised that there is no way to mount the table to the unit without drilling your own holes. Really? That seems very strange to me. Did they ever mention why this is?
I think the idea was to let the customer decide, but yep, it was one of the three dings I gave the Obutto. The good news is its resolvable fairly easily.
I'm sorry for so many questions. Please don't think your review was lacking in any way. It wasn't. The detail you went into just had the effect of making me have even more questions. I think I've found my ride so to speak. My biggest concern is the stability of it and its parts.
Thank you again - I was really looking forward to this review.
IMO, its stable. I can provide a snapshot to date of what I've tried and seen, but there will be more feedback in a month after I spend some additional time with it.