cheers Les, credit should go to Londonsean69 for the idea in the first place, i,ve just taken it on & found a locost solution,
hope it is of use to others too.
i,m only using thin ali for my tunnel sides so any extra protection from a failing prop is welcomed, its even better knowing that it was free,
i mean after all i HAVE to keep my reputation for being a tight git
cheers
andy