I remember seeing that before on the US forum.
Couldn't stop laughing. A walker???
Wouldn't the telescopic legs be better?
Looks quite low.
If you need one I am selling my projector stand That i used for my Lap Steel Guitar . That can fit a double neck.
It also has rubber feet with telescopic legs.
You just need to put a rubber mat on it - I use to use the square hot matts from iKea and it stops the Lap Steel Guitar from slipping.
pm me if you are interested. As i'm not sure if you want to play out with a walker.