Chassis Dyno opinions? Options

[RJMII]

My point and click adventures today landed me on a chassis dyno on eBay.

http://cgi.ebay.com/ebaymotors/PORTABLE-DY...omotiveQ5fTools

I've been contemplating the idea that there aren't any chassis dynos within 160 miles of where I am sitting; and that there *might* be enough people in the area that are potential customers. Oh, and if I go for a portable system that could be loaded up in a small trailer, or at the front of the trailer in front of my 914... (pipe dream here, back to the dyno)

What say ye? quality of dyno? company's reputation? Accuracy of dyno? company website http://www.dynocom.net/index.asp

Other dyno options (portable chassis)?

[RJMII]

Of the features that apeal to me:

Pod style: AWD by adding two more pods later, this will allow tuning 4wd trucks which are rather abundant around here. The wheel bases on these range from Short Jeeps to full mega cabs. This will benefit a friend's dad's Diesel shop that's gaining quite a reputation for good upgrades.
Portability is easier to manage, just roll them into an enclosed trailer, and head to WCR or other events where I can charge just enough to help pay for gas to get there.

tumbler/inertia type: no taking tires off, just drive on and strap down. 4wd trucks... not all of them are full time 4wd. Co$t. Can be integrated into trailer for portability.

as to tuning: yes. as to lawyer and waiver, of course. as to giving it lots of thought first. yes, of course! This is in pipe dream/hash it out in a forum stage with fellow enthusiast.