Originally Posted by Filmshooter
Sorry, maybe I wasn’t clear - all I want to do is figure out a way to build up the base to make it 4” or so higher. Sorry for the confusion.
Figure out how the chair is anchored to the floor. Build a platform of 2 x 4 and plywood, (cover in carpet or paint) and extend the anchors through the platform back to the chair. Not a difficult project, I'd just do it, not post about it, personally.