Sigma Flash User Guide

Does anyone know if anywhere there is a downloadable user manual for the Sigma EF 530 DG Super flashgun.
On the Sigma website there is one for it's predecessor the EF-500 DG Super, but not the 530.
There's probably not much difference but as it's on my shortlist to buy, the user manuals are the best point of reference.
I really want to read the one for Pentax, but any will do.