I have sought guidance here before on what others thought of drum sanders and though I don't think its the ultimate answer to my specific sanding needs I do see the merit of having a drum sander. I don't however understand the usefulness of a double drum, in theory I guess I do, but I struggle to convince myself it actually speeds up any of the sanding process since you would theoretically be wasting one paper or the other depending on which grit you actually need.
If someone smarter than me wouldn't mine either confirming my thoughts or completely dismantling my theory I would greatly appreciate it.
Cheers!
Casey