Programmable mode that's less resistance at max ROM (for things like lateral deltoid raises)

I own a medical exercise clinic and I'm looking to upgrade my equipment. I really like the idea of getting a rack based functional trainer and replacing the weight stacks with electronic weight that is programmable for eccentric loading and the like. One thing that has huge potential here is for deltoid exercises - where you can resist a lot when the muscle is lengthened but as it contracts the resistance just piles on more than necessary. Would it be possible to program a Voltra to do something like a reverse-resistance band that starts at 20# and ends at 10#, then adds eccentric load? This would be a total game changer for my business. Thanks for your replies!