This was posted on the HPI forum and it asnwers some questions I've received here as well.
. . . it is much more stiff than both HB decks, we've track tested it along with the "flex test" by hand. We wouldn't sell it if it didn't add enough rigidity to the car. It worked out extremely well. I think you would be quite surprised by it.
. . . My digital camera is on the "blink" so I just had to scan the test car in with a flatbed scanner for this picture. We'll have better pictures ready next week. But everyone at the track when we were testing it really liked the way it looked on the car. Very clean and nice angles. And when you add the castor braces they flow well with the design.
In this picture, we have it bolted with 5 screws:
You can also bolt it right down on top of the steering post brace without the use of spacers. We will be including the instructions on line and will update the site with the link in the drop down menu.
Pro1, Thanks! We thought about making the bracing hardware available through TeamPRP, but it would cost us a significant amount of money and you should already have all the parts needed. All you need for each side are 2 ball studs, a hex nut, part A451-2(the servo mount that comes with A451 suspencions arms) 2 ball cups and about a 1.75" turnbuckle. And you can always add your own way to attach it to the hub carrier. You can view the instructions here: http://home.attbi.com/~teamprp/instructions.html
For those interested, we are also going to make a chassis, probably a limited run just for the guys that pre order it, but we'll have the info on our site.
Thanks a lot guys!