[Closed] Alpkit Bikepacking Storage

I have a few questions around the area of the AlpKit bike packing luggage.

First up, anyone running the framebags with a large 29er on-one inbred? I'm not sure what width to go for. The bike is currently running 1*10, but I'd like to have enough clearance for the option of running a granny ring while touring. Would I get away with a 6cm framebag? I'd obviously like the largest possible for more carrying capacity. Anyone care to comment on any upgrade options they went for? I'm thinking of upgrading to the surgeon opening.

How stable is the Koala seat pack? Do those using one find the unit reasonably stable, or that it constantly moves around, or restricts movement at all?

Also after general feedback of how people find the Kanga? Does this interfere with brake levers, shifters, etc?