FWIW, I got a New set , and ordered a spare hook set, old type , and put those on ,
+ transferred from my older set, a second set, they are 10mm only,
I use them on my Ortlieb racks, and the fit is perfect.
swapped the newer hooks off one pair onto the set i hang on my Bike Friday
they use a tube slightly smaller than 8mm to make their pack flat racks.
a little tape and rubber on the lower portion, for that hook..