[Ric]

Thanks to everyone for their suggestions
I've decided to go with the camping mat technique and glued the mat together with a foam/rubber glue, I also glued a strip of heavy cardboard down each side of the join for extra strength.
I even had enough left over to make a Hartman mask and a dew shield for the finder scope as well. They are all working well and all for $31, not too bad at all.

All the best

Ric