Sambo Ground Work instructional?

Are there any good instructionals out there regarding Sambo groundwork beyond just the submissions seen on Igor Yakimov's tapes? I'm looking for something that also discusses Sambo movements on the ground, escapes, "pinning" theory, etc.

And has anyone take a look at Gokor's tapes? Any good?

Vlad Koulikov has just released a series of Sambo Tapes
go to www.shogunmedia.com and check them out.

Dynamo,

have you seen the series? Any good?

Vlad is sending me the series. I have not received them yet, but knowing Vlad they should be very good.

dynamo,

whenever you get a chance to look at them it'd be nice if you could give at least a brief review of the set.