Robert wrote:

I have 804 WU's. I got the last certificate at 500 WU's. Is there no one
at 750 WU's?

Do I have to wait until 1000 ???

There should be a certificate for 750 WUs: the sequence appears to go
100, 250, 500, 750, then repeating for each successive power of ten.

-- 
Odysseus 12# @ 31Y