My sincere apologies.
JB made a ‘state the obvious post’ so I made a tongue in cheek reply and off he goes on one.
My bad, but I forgot that some on here are rather up tight.
The Hyperpro kit on my ATAS made a huge difference.I had a new spring for the rear and new fork springs , set up for my weight.
No reason why the same bike specific kit wouldn’t improve the GS no end .
That all sounds good. I emailed Hyperpro earlier about springs for my weight and usage pattern ie needing to able to deal with solo all the way up to two up with luggage. Looks like from what you've said they should be able to adjust accordingly.
Did you buy direct or via a dealer? I've asked that too... just awaiting a reply...
cheers