Could not agree more dear Ingolf ..
But for these kind of "very small gigs"(grab and go";) the question (at least for me) is not if I have a 3HE-rack or a 5-HE-rack but rather where to put any kind of rack next to the espresso machine on the bar at the entrance of the students-bar.. ..ofcourse there is not even the space for the monitor..
This is because I had the "dream" of a floor-style Kemper "profile-player".Now..if I play the gigs with the KPA/Remote/FRFR-combo 3 or 5 HE are not my issue.It is more the bad experience I had with no back up at all.This happened twice to me.Including angry bandleaders and venue.owners.Dont want to start with the "murphies law" bla bla but to be honest I feel much better with some back up.
I hear you @Nikos but the ZOOM MS-50G @Ingolf is reffering to is a complete (FXs + amp tones) solution that will fit in your guitar gigbag pocket! Probably the lightest and smallest complete backup available!