so far the bikes got a comfort seat, 25mm lowered footpegs, a full set of luggage plus tankbag. I've also sorted out a usb power socket for my phone/satnav.
I've also got a tall touring screen. is there anything else that would make the journey easier or more tolerable

i'm planning for two 500 mile days, although i'll possibly push the mileage on the first day, as on the second day i'll be riding through the pyrenee's. it'll be a tough first day tho.