So... I was using the Vac Sys to hold a piece of cherry-veneered MDF to sand it prior to staining and laquering... very handy... but I noticed round marks on the wood that showed up when I stained it. Have others experienced that?
Is it the Vac Sys pulling out more saw dust in that spot? I DID thoroughly wipe down the wood before finishing, and had the CT36 on when sanding with the ETS 125/3. Or is it just the rubber leaving marks on the wood? I have only used that particular vac head a few times, but had not stained anything I had held on it yet.