Don't worry about sending your tickets in you'll still be out of pocket, we did this and they sent us a cheque for a full refund and when we came to cash it hey presto it bounced. So no tickets to re-use and no re-fund.
One of the best teams we had back in 96 or 97 or something like that, was built late on with Wiggy,Shane Parker , Paul Hurry etc. If my memory serves me well they knocked Ipswich out of the KO cup with a team containing Rickardsson, Louis, Nicholls etc. best meeting I've ever seen.
the problem with air fences is that if the bike goes in first they are a waste of time. I believe this is why Lewis Kerr was so badly injured at the fours. The bike punctured the air fence and left him to hit the wooden fence behind.The bags should all be filled with foam or polystyrene so there is something left in them if the bike goes in first.