DTS400, 400 hybrid, or Rotex 90?

[Farming_Sawyer]

I'm in the market for another sander... Mostly for corners but also narrow edges, stair work, door and window finishing.  The DTS 400 req seems the natural choice. But the cordless/corded hybrid set seems like it has a place too... Then there is the ro90, with a more aggressive stroke. Thoughts? Reviews? Cost isn't an issue. I need a sander and I have work to justify a specialty sander. But I don't want to get something impractical.

 

[Alanbach]

If it’s all new work then the DTS for sure. If it is all remodel work and so you are sanding through layers of old paint, now I might have to think about the RO90. I had to refinish two interior barn doors for my daughter that had a light stain color (on a new door) that did not work. I bought the DTS and it was great. Actually quite a bit more powerful then I thought it would be. The barn doors had so many angles I had to sand into and so many edges to sand up to and on. I remember thinking that with this 2mm sander it was going to take forever to get the old stain off and that I might have to break out the Rotex for the bulk of the flat work but I did not. I just got some 80 grit and went to town. Many of the angles were less than 90 degrees and the DTS would not quite fit in there so I used it up on edge and at every angle. If you buy the DTS I would buy and extra sanding pad so you could have one that you keep nice and another sacrificial one for tough to get into places.

 

[AlexThePalex]

For paint prep, DTS is the first and best choice.

 

[Sanderxpander]

The Rotex has its use but it's not very ergnomic compared to a DTS 400. Which in turn isn't as ergonomic as a Mirka DEOS (which also has significantly more power). If you do mostly edges and 90 degree corners I'd go for a DEOS, if you need something ergonomic for corner work, the DTS, if you need to strip a lot of narrow frames or boards and don't mind working two-handed the RO90 is great, and it can do the occasional corner work as well (if you invest in yet more sandpaper).