Seat cushions for racing seats

The Hunts racing seats in my special look the part but due to primitive leaf spring suspension the ride on pot holed public road in Scotland give me a sore back. I decided to get some seat cushions made to measure. I was given a contact called GJ Upholstery in East Preston as a likely contact.

May this be the answer to some longer runs?

Video of recent improvements with Seat Cushions

Here is an Index page for the build