Pendekar William Sanders, if I'm not mistaken started his path in Silat with one of Silat and Kuntao pioneers in US-Willie Wetzel. It was long time ago-I think well over 20 years ago. Willie Wetzel was expert in Cimande Silat, with very good skills in many other methods of Silat and Kuntao. Alongside Willem Reeders, Eddie Jafri, deThouars brothers and few others, Wetzel started exposing Silat and Kuntao in US in 60's.
Pendekar Sanders has traveled to Indonesia several times and while there trained with local experts in all aspects of Cimande. If you read around you will find that Pendekar Sanders presents some topics that are controversial in MA community in general and in Silat-Kuntao in particular-such as spiritual practices(that were, btw, common in some Silat and Kuntao methods as practiced in Indonesia, Malaysia), Tanaga Dalam,Ilmu.
I had no opportunity to meet Pendekar Sanders, but from my experience with some people from Wetzel, Reeders lineage and from talking to few people that have trained with Mr.Sanders-I don't see good reason why not to go and check what he has.IMO
Sonny Puzikas
PROGRESSIVE COMBAT CONCEPTS
Systema, Kun Tao, Silat, Kenpo