OK Wherestug. You and of course also the rest of the gang deserve points for what I allready have done (!) but now clearly explained in words! Thanks !
Before all this I allready figured out what the best option for me was and therefor I had it set to Post Stack, meaning volume control to the last in the chain, right?
Back to my topic start. Is having a pure booster in my solo rig the only (if not the best) option to raise volume for that purpose. I tried this but the output led protested in red... Is this due to the chosen amp module? It's not an option to look in 17337 rigs in RM to look for an amp module with enough volume power of its own (and not show red led) for use as a solo sound.
And you all are right at this point: Only one rig in the gig is enough for this purpose ...