@jimp thanks for looking into this. I will use that URL for future items. I did not know about that other URL until today.

As soon as you have access to the full, decrypted data stream it's most probably possible to cache everything. But : The, for example, ccs style sheet file, can have a unique name - and won't be re used ever again, so it will get reloaded anyway. The file creation date can be set to 'now' so the browser will request a fresh copy, even if the content didn't change at all. etc etc .

Thanks for the info. Astounding is what this is. :-)