Our customers wanted as much space as possible to remain on the stairs once the curved stair lift was installed and asked for a "very snug" fit. The streamlined track on the UP unit allows for the footprint to be small and compact while still allowing room for the chair to swivel at the top and the bottom of the stairs. Since the UP track is modular and does not have to be custom welded we were able to install this curved stair lift within one week of completing the evaluation! Our customers are thrilled that mom and dad can now visit from abroad whenever they'd like and for as long as they'd like!