Noob necro bump.....I've been searching all over for a tank bag that does all this:
Fits the 990 well
Easy zip on/off with base straps that do not damage paintwork
Expandable but with inner stiffener on lower walls
Will convert to ruckack AND has a built in stowaway helmet carrier that you can roll out on road trips when off the bike.
Only multifunction one I found was an Icon Urban but it's magnetic .....
Looked at Wolfman stuff, Famsa, KTM, Fandango
Is there anything else out there?
2011 990 Adventure