Hi Werner - long time no chat!
The 'small brother' of the Giant Loop Fandango is the Ginat Loop DIABLE PRO: roughly half the volume (so lower), but the identical footprint...
One little-know benefit of Giant Loop is, unlike SW Motech, they sell the tank bag harness SEPERATELY, so if you have two bikes, and wish to transfer - easily! - a tank bag BETWEEN two bikes, then its doable!
I personally ride with the SW Motech/Bags Connection Enduro Light, which expands vertically, and has a very small 'footprint'..., my G450X has a non-existant front tank (it;'s underseat), so even the Fandango and X were too big for my needs!
Cheers
Chris & Team