Can you elaborate when you say that you have full EX-LINK serial control working. I have an arduino that I configured to send codes to my q6 65inch and I have almost full support. Every code works except "get status" codes for instance,

Volume(0~100) 0x80x220x400x10x00x00x95

returns not available

Does this code work for you?

Basically I need to know what the tv volume is at all times.

This thread has been incredibly helpful.