Has anyone tested to find out if there are any additional RS-232 commands besides the ones documented by Outlaw in the spec?

It's disappointing to find that the list of commands is extremely short and doesn't even support as many commands as possible through the IR remote.

I'm also not sure if it applies to everyone, but on my system, the RS-232 commands for preset volume levels (low, mid, high) are really inappropriately named. They should be medium, super loud and crazy knock down the house loud.