I've made a slight adjustment:
I probably don't need to go into too much detail regarding these photos, but this is just a quick fix at the moment. The VESA mount I'm using isn't particularly good, there's far too much play in it as you can see in this quick video (which Imageshack has lovingly rotated 90 degrees for me so it looks like I don't know how to use a phone camera, but you get the idea):
http://imageshack.us/clip/my-videos/716/file20787.mp4/
So I don't think this resembles what I will have when it's finished in any way at all, really. I can't find any other mounts similar to this one with a slim mounting base, so if I were to use this sort of thing I'd have to extend the 'wall' more to the right, beyond the end of the cockpit. I'm not too sure if the MDF would take the weight of three of these, either, they're 7.7kg each with the mount and the board would feel more than that as the bulk of the weight isn't flush, it over hangs by about an inch or two. Also the monitor feels too close right now, I measured 64cm between my eye and the monitor (nearly scratching the monitor whilst almost poking my eye out at the same time), sitting at my desk I'm typically 85cm from the monitor so I'd like to move it back quite far.
That, then, begs the question of just how exactly I can mount the monitors in such a way that they're high enough, far enough away, straight enough and sturdy enough.
I don't think the aluminium I've used so far is strong enough for such a task, but the problem is the thicker stuff scales in price directly. That is to say a 1m length of 22x22mm is £6.40, 1m of 22x44mm is £12.80 and so on. I would want the mount to be made of two vertical 1.02 metre lengths of 22x66mm, supported by an A-frame of 22x22mm to make sure it doesn't fall over either way, as I imagine it would be free standing (because the alternative to free standing is mounting it to the rig, and that would make the monitors too close), so that would be pretty bloody expensive, probably more so than what the aluminium I've used to make the rest of it cost in the first place.
The other alternative is to extend the depth of the rig and use three of these:
The problem with this idea is simply that each one of these costs £32, so three would be getting on for £100. Add to that extending the rig would cost at least £24, and once again it's ridiculously expensive.
I could possibly combine these, though. I could extend the rig and use an MDF 'wall' or aluminium again, maybe if it weren't free standing I could just use 22x22mm because the extension wouldn't be quite as high, but both of those options still raise the question of exactly how to mount the monitors. Maybe if I made the mount out of aluminium I could use the 90 degree brackets I've got elsewhere and not drill any holes, because I've found it impossible to drill a straight hole; the pillar drill I've got just will not drill straight, and it's always different.
In other news, adding monitors to the cockpit does mean I can't play GT5 properly any more. The monitors I have don't really support 1080p nor 720p, but I can use them... It just means I have to choose between a stretched image and having to press a button to dismiss a warning or having a correctly proportioned, pixelated image which has the edges cropped off, which you might be able to spot if you look at the left hand side of the monitor in the first photo. Not a huge loss, particularly as I don't have two other PS3s to play GT5 in triple monitor and the cost of upgrading my PC to play in triple monitor will make me far more inclined to use it more often, but it's still a little irritating. The plan, then, is to leave the PS3 where it is and then possibly think about changing the monitors to sub-£200 22" 1080p ones and get two more PS3s when my bank account has healed from the 24" monitor, GTX 680, TrackIR (possibly), the huge amount of buttons and switches, some laser cut acrylic and who knows what else.
Long story short, I'm not too bothered about not being able to play GT5 with my wheel so buying the stuff I need to play it properly is way down on my list. I think rFactor is better anyway.
I've made no progress on anything else, except maybe for reconsidering Left and HoiHman's suggestions to get a 4GB GTX 680 rather than a 2GB, if that counts as progress. Oh and I think I've found a fairly easy quadrature decoder circuit, but I need two MOSFETs before I can build and test it and I can't place an order just yet because the weight of the shopping list is too much for my bank balance to bear just yet... Next week I should have more to show or talk about.
Edit: I really don't know why but I appear to be completely incapable of making any sense today, parts of this post are really oddly written. I apologise but there's no point in trying to fix it now, it might be because I haven't eaten for a good, oh, 12 hours!