Where to instal my RO/DI setup?

I have a basement, and also well water. I will be making water in the basement.

There is much more presure on the well pump, directly from the pump, before the preasure regulator than there is on the side after the regulator, prefilter and/or water softener.

Could I install the ro system before the regulator on the well pump without hurting my well? Does it mater what side I put it on as far as well safety in mind?

I would prefer to hook into the plumbing before the presure regulator, and make water a bit faster on the higher presure side, if theres no reasons not to.