OK, got some way in this using surface and seed for quilts [oddly there isn't a quilt filter) but unconnected surfaces still need to be picked one-by-one, a real pain as there are hundreds of tiny shreds.
Does anyone use IDD to clean up imported surfaces?
When i use the command search in IDD, it shows there are a couple of icons for box selection, but ironically they are all disabled
Edit: just found out box selection is enabled only when u select "surface" or "edge" in selection filter. works with non conected surfaces as well. Creo 2.0