Well, it was nice of him to offer but he will be unable to make it due to the circumstances. I trust he will do a make up at another clave.
Anyway, that leaves John Middleton and myself (for those who don't already cast better than we do!)
Seriously, both John and myself have taught many people how to cast and improve their cast, and it would be a pleasure to see if we can detect anything that you'll find helpful.
A tying clave would be equally appropriate and perhaps much more sensible. In any case, there is no need to rush back on Saturday afternoon. Take my advice, you won't want to miss the Estey Bros. camp dinner though!