Yea I have the Gammoh on the fixed gear and it's a beast. I love it but my commute is now a 52km round trip with a few hills with the added bonus of having to drag my bike up 4 flights of stairs when I get into work. The Equilibrium isn't exactly light as it is.
Appears that Pelago only provide a 9mm thru axle adapter.
I just use a modest bar bag for carrying lunch/small items. Stopped using the Gamoh as it's a bit big/heavy for a long commute.