Great review BobbyG! Looks like a really nice unit.
I have 6.75 hp, 20-22 gallon Craftsmen. It's about 10-14 years old. One thing I like about my unit is the motor is detachable and can be used as a leaf blower. It works great blowing out the garage and blowing off the car, however, you have to be careful doing the latter.
One comment on suction power, regardless of all the numbers others have mentioned here. Nintey (90) to one hundred (100) inches of suction is a tremendous amount of lift for a vacuum, but each lift rating, per vacuum brand, is only comparable if the hoses are the same diameter.
Ninety inches of lift in a 1.5" hose takes a lesser amount of horsepower than 90 inches of lift an a 2", 2.5", 3", etc. This is where the horsepower factor will make a difference. In other words, it takes more horsepower to make 90" inches of lift in a 2.5"-3" hose than it does an 1.5" hose. The cfm's will also be greatly reduced or increased depending on the hose size. Of course, most of you realize this.
(NOTE: The above statement has nothing to do with how manufacturers rate their vacuums, or reach the horsepower ratings they advertise. In the above statement I'm speaking specifically from a numbers point of view. Larger hoses take more horsepower to create a given amount of lift.)
That said, I prefer larger hosed vacuums for most of my work because of not having to unclog a hose. Years ago most shop vacs had these small hoses and were a pain in the backside. Of course, vacuuming most dirt and grit in cars the small hoses are fine. It's the occasional big chunk of whatever in a car that's the culprit and I don't have time to fiddle with unclogging a hose or hooking up the larger sweeper.
If your car never sees large pieces of debree (read, rarely gets real dirty) then the unit reviewed would be an awesome option for you.
EDIT:
These comments were not meant to detract from BobbyG's wonderful review, rather, to cause folks to consider what sweeper will best suit all of their needs.
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