Update ... Gig completed, without any hassle (from the KPA). Soundies were familiar with 'A Kemper' - gave them a mono feed from the main out. Monitored (in ears) via their system and had a cab behind me which (when I took out my 'ears' ) was bloody loud and gave me a nice thump in the back for that 'in the room feel'!
Nice room too - Royal Albert Hall (Clang!)
Awesome! Who did you play with?