Propel Orthodontics.. Truthful response about the pain level of the Accelerator treatment and speed of the Vpro5 alone. (photo)

I'm on tray 1/33 of Invisalign, predicted treatment time: 18-22 months. What are the actual statistics for JUST the Propel Vpro5 as opposed to the device & accelerator (I've heard with both that it's around a 50%-70% cut, but can't find any sources about JUST the Vpro5!). Also, Is it possible to just get the Vpro5 without the Accelerator treatment along with it? (I know it will be faster with both.) I have a low pain tolerance (Even pressure from a SMALL cavity being filled was too much)

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