Thor (as well as other manufacturers) have been going to a six motor Schwintek slide on some models, especially on the full room slide outs (the previous ones had 4). You can tell by looking at the aluminum "toothed" rails on the sides of the slide room.
The 6 motor slides will have three of those aluminum bars on both the front and rear, while the 4 motor slides will have two. Not sure if the 6 motor slide is offered on the new ACE 30.2 models or not.
Some full room slide outs have had issues, and whether or not the additional motors will fix it or not remains to be seen, but at least it's probably better than the 4 motor slides.
If I were to buy a motorhome with a full body slide, I'd only buy the model having a 6 motor version. On the other hand, I wonder about the integrity of having such a large hole in the side of the coach - roof support wise, and I would be a lot more comfortable having two smaller slides. But that's just me.
On the other hand, that is the problem with technical people, we tend to over analyze things.
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