I am aware that Nik appropriated some of the changes folks like Zucker have made and incorporated into the amplifier OTS.  I am curious if any are incorporated in the latest OTS? 

If so which are they and which did he not incorporate. 

Nik wrote me and told me that the current OTS is more similar to the Dumble "more original circuit" than the others.

That being said I know they have changed a bit since he started putting them together.  What I am trying to do is nail down exactly what I am getting so that I don't waste time trying to change something that need not be changed.  In other words don't want to chase me tail.

Thanks for any and all info in advance.

Regards,
            Jonathan