I made a belly pan dust collection for my BT3000, using a commercially available, cheap dust pan from one of the woodworking supply houses with a 4" hose fitting.

It seems to work effectively very simple DC belly pan under BT3000. Not tightly fitting I wanted to allow air in to carry the dust to the DC, pulling on a closed cabinet is not a good idea. So the plywood sits on the stand, not screwed down or anything. So there's air coming in thru the ends and the Shroud dust port arc....