I see a couple plane board built from using the foam panels they use on house. Light weight and easy to transport. They used 1x2 for legs.
I read one poster on another forum talking about the full size plane board which allows for the right forearm trace/plane etc. He stated the difference between the half and full size was no comparison.
Problem with a big one is storing and moving around.
If you want to take it to the driving range, you probably don't want to have to take flat bed truck with a fork lift (if you build it out plywood).
