Very well explained, PenangsangII.
You can not run away from the roots. Javanese keris making have made such a huge impact through the archipelago and therefore it's influences nourish even as far a place as patani would be. It's a pity that the keris history from this other side are not well documented, or not really documented at all.
However on the bright side, these kerises as what we called pandai saras, carita etc are still recognizable and sometimes found in such a condition that implies a well-respected care and maintenance are of the presence. Thus what we all have are the evidence and the theories, not a textbook.
Even though javanese influences are there, still the empus from this region are creative enough to come with new designs and different proportion of materials. It could be that the limited resources of the area are a factor of this, but still I think the material used in patani kerises are of good, comparable quality. Thus I learned to recognize pandai saras or any other patani keris from it's blade materials.
What limits me is palembang blades, which sometimes could exists with similar materials. It can get really confusing sometimes.
Anyway, thanks for your concise elaboration of the pandai saras, I learned new things today.