> My question is this, does anyone have experience with approximately how
much
> weight one can put in the rocketbox and still keep the poptop in the UP
> position without causing any damage or other adverse events to the poptop
or
> any other parts of the van or persons?
> Any thoughts would be greatly appreciated.

Doug,
The problem will be lifting the pop top with weight on top of it. I have
read a post on the list that claimed they could lift the top with a kayak on
top (with great difficulty)... but I installed Thule gutter mounts and bars
last fall and found it difficult to lift just with those installed! So my
guess is you will have to unload the contents of the box at least... and
possibly the box itself to raise the top.

Bill