With Flex EOLing the 3401 and just about backordered everywhere I'm wondering if anyone has intel to what is replacing the 3401 & timeframe or should I start looking at a Rupes Mille? I need to add a forced rotation to my inventory or Im going to have to bail entirely and add a DO machine with pads. Currently using my dewalt rotary but its getting heavy and Im getting older. Thoughts or recommendations?