Glad it worked out -- but I would like to keep this thread alive and get a response from @TylerC
about a related DC issue on the RO90.
As has been pointed out on the FOG a number of times, dust collects fairly quickly inside the metal housing of the RO90 head, requiring that you remove the pad and dislodge the dust with some frequency. When I was at the Festool Roadshow a couple of months ago, I brought up this issue with the guy who was demo-ing the sanders.
His response was that Festool has -- or is soon to -- adopt a fix for this issue, where the inside of the metal housing near the dust port will be perforated rather than solid, so that the dust does not collect as easily there. When I asked if it was possible to retrofit my RO90, his response was yes, and if it were still under warranty (mine is only 2 years old), the retrofit would be covered. So I'm wondering if you could confirm whether what this Festool employee said was true, both the fix and the retrofit part.