[CB works]

I have done around 10 to 12 ipe decks and out of those 10 or 12 decks 2 might have been perfect with no warped boards. The problem with these large sanders is that if there are any cupped boards you can't get down to the bottom of the "cup".

I use either an orbital sander for the smaller decks (under 500 sq ft) or a variable speed grinder, with a pad I use for sanding surf boards that is very flexible for the larger decks.

If you use drum sanders, and you have cupped boards, do you have to sand the edges of the boards to get down to the middle of them?