I am putting something like that together to make a 420 mile one way trip to see my dad. Not sure if it will hold 3 pairs of shorts and jerseys, rain gear, and the other tidbits. Looking at your setup, I might be ok. I know. I need to get off my butt. I have a handlebar bag and Reveleate Vescace saddle bag. Total volume is around 15L.

Nice setup btw. GL.

I am going to run a more comfortable tire (32mm Compass Extra Legere)