NordicTrack (ski Machine) Mod for Balance Rehab

I have bad balance and have wanted to use our NordicTrack ski machine for exercise when the weather is bad or it's too hot outside. So I came up with the idea of using a walker to provide side handles for support so I can use the machine as a kind of ski tread mill. I am hoping I won't need this setup for too long!

The setup: There's really nothing to this project except finding a cheap walker (check thrift stores), building the wood base (see second photo for detail) so that I can comfortably hold on to the walker handles, and finding some straps to prevent the walker from rocking too much.