Kustom Double Cross Schematic wanted.

[Captain chunkulus]

okay, so Im looking for a Kustom double cross schematic.  I recently purchased one of these amps and well, I would like to mod it. It's very similar to a 72 coupe but has a lot more going on. It's easy enough to trace most of the circuit but some stuff alludes me. E mailed Kustom and they wont respond to me inquiries. Thought about contacting James brown, the guy who designed it but is that wrong since Im pretty sure he no longer works for Kustom. Also, the amp is discontinued so is there any harm in them giving me a schematic? Just curious what your guys thoughts were.