Nice looking bike - I'm in the process of fitting a Woosh kit to my touring bike right now. I only recently came across the concept of gravel bikes fairly recently but they strike me as what hybrids tried to be when they first came out - something that was all things to all people - good for distances on road, commuting and potering along canal tracks. Before hybrids were invented we just used touring bikes of course! Now touring bikes almost never seem to come with drops but look just like hybrids whereas if you get a gravel bike and stick mudguards and a rear rack on, it transforms into a traditional drop bar tourer!
I have vintage 22mm drop handlebars which are the same diameter as straight bar bikes so it's hopefully going to be easy to fit the controller to. If modern drops are thicker than straight bars, and controllers are designed with straight bars in mind, how do people generally fit the controller to drops, other than with a handlebar extension?