Pride and the Quantum chairs are the biggest crap chairs around...cheap parts, lots of plastic, motors burn out easy the list goes on and on.
I came from Pride Blast 850, 2 Pride 6000's Pride 6000z, Pride Edge 1.0 all but the Blast 15+ years ago have major fails.
Pride also took a bad turn at the customers expense and started using NF 22 size batteries to cut cost and this gave the customer a terrible experience with only 5-7 total miles per charge.
But insisted these batteries provided enough miles per charge customers even though customer had been complaining!
The complaining got so bad Pride shut down both customer focused websites leaving customer nowhere to voice concerns!
http://ownersclub.pridemobility.com
http://www.wheelchairjunkie.com this now routes you to a Pride employees personal blog page and is one sides you cant voice concerns or product questions any more.