Recently,a good blogger buddy of mine and I had a chat about mounting the Arkel Handlebar bag on a bike which is not equipped with bar-end shifters. In addition, the bike also had cross-brakes. The combination of having the cross brakes on a bike with drop bars and the added complexity of the presence of cross brakes, eats up a lot of room on the handlebar and makes mounting the handlebar bag somewhat tricky. I wrote about this once before and I believe I have added some more finer points to this post on the same topic. By the way, I don't claim to be a bike guru, but this is how mine is setup.
I attached a Nitto Lamp Holder to the handlebar first. Then, the Arkel Handlebar bag clamps were attached to the Nitto Lamp Holder. Obviously, Shaggy can vouch for it!