Flash, et al,
Ok here are some images of my Cargraphic brace. First of all, after viewing images of all the sparkling clean engine compartments out there, I'm terribly embarassed to show my grubby under hood area. It's just surface dirt that should be easy to clean off. I guess since I've been tracking the car, I've sort of taken the attitude that if it won't help get around the track any faster, I'm not that interested in it.
As you can see, my brace doesn't have anywhere near the clearane that Flash's does. Whoever installed it modified the vanity cover (very nicely, I might add) to provide clearance for the brace. As far as your other questions, it came with the car, so I don't know anything about what the previous owner went through to get it installed, and I have absolutely no clue about pre-load capability. I don't even know if Cargraphics is still in business, and if so, whether they still offer this brace. In any case, yours is much prettier, and looks like it was well worth your effort.
DS, you raise an interesting point, probably worthy of a separate thread. All my life, I've read in the car magazines about how the testers are able to discern the minutest differences in subtle handling characteristics between cars, and within a given car before and after specific mods. I've now done four DEs (eight track days total), and while I finally feel like I'm gettng the hang of it, I have to confess that (and I'm exaggerating for effect here) you could probably let half the air out of one of my tires, pump another one up to 60 psi, put the spare on a third, and saw my rear sway bar in half, and, up until maybe my last session when things really started to jell, I probably wouldn't have noticed any difference. I'm so busy focusing on my line, smoothness of braking and throttle application, heel-and-toe downshifting, the flag stations, unwinding the wheel after the apex, looking ahead to the next turn, etc., etc, ad infinitem, to notice the specific handling characteristics of my car.
My personal opinion is that it will probably take me (and I have no idea how typical I may be) a good six full weekends at the track before I start noticing how the nuances of tire pressure, suspension geometry, spring rates, etc. impact the balance of the car, and consequently my ability to negoriate the turns. Basically, I think it just comes down to a LOT of track time to allow yourself to stop focusing so much basics of your driving technique, and start to notice what the car is trying to tell you. So I, too, probably wouldn't have a clue as to whether my car has a strut tower brace or not, so don't feel bad. I'm curious as to what other people think about this, and would be glad to start a new thread about it. Thanks for raising this issue, as I'm sure you're not the only one who feels that way. It's just one of those thing that many (especially us car junkie men) aren't too willing to admit to.