I've pm'd Olly about the pm you've sent to andy and I have copied that pm to Andy as I think we can help.
On a serious note, I can't understand why anyone would not answer any and every sales email with a fairly good reply.
Although I know a few from this board that take quite a while to do so
I'd rather wait 48hrs for a detailed repy, than a reply in 10 minutes where as you say they have only read the first part.