I tried the combo again earlier today, the FSW setting is definitely brighter and totally different to the Flat and Scooped switch settings.
interesting this popped up. Im on the lookout for a new combo or head and cab. I tried the combo you got at Denmark streets wunjo's in central London. Wanting to give GK and laney digbeth a try before i decide.
I was going to suggest contacting Markbass directly to get an answer.