Wanted to post an update on continued experience with the QuickJack.
A few of my friends were getting together to prep for a DE session so I loaded the QuickJack up in my wife's SUV and hauled it over to where we all met.
We used it on it 4 cars that day.
2002 996
2007 997 S
2012 Cayman
2012 Boxster Spyder
Keep in mind this is the 5000EXT model. It fit between the wheels on all the cars but there is a trick to using it with the 996 & 997. The Cayman and the Boxster were easy. Since they're mid-engine they have a slightly longer wheelbase.
To accommodate the 996s & 997 what we did was place the QuickJack ramps between the tires with the "front" of the ramps facing the back of the car. We then drove the car forward about an inch or two where the rear tire was just barely on the ramp. Then we put the blocks at the normal lift points and raised the car.
The reason we had to do this was because if we didn't the front of the ramp would bind against the front wheels.
Also, keep in mind that the "front" orientation of the QJ ramps needs to be used facing the rear of all the cars as Mark noted since the weight is in the back. Probably wouldn't be as much of an issue with the mid-engine cars but that's the way we did it.
Here is a pic of one of the 996s.
We bled the brakes on all the cars in no time. It was an assembly line -- we just did one right after another.
I'm very pleased with the decision to buy the 5000EXT. It has the best overall fit for all the cars in my fleet and it still works fine with the '83 911. It's nice knowing that it will work with other Porsches too.