"The usual rule of thumb is to keep the html objects small and with short expiry times (or mark it uncacheable) and mark the larger objects with longer expiry times. The larger objects are the ones that you don't want being downloaded all the time anyway, since it will both load your web server and give users the impression that your page is slow. "
I thought by that you was reffering to size of file?
I ran a link through that url and it seems to confirm my proxy server is only proxying and doing no caching which is what I want
