Cool. The other advantage is with the lower exhasut is pannier style fuel tanks but then again that may not be the issue in the US as it is here where riding to some places requires 50L+ of fuel.
Love that you are realising a dream. We all have different views on what an ADV bike is and its great you are building your version of it.
When will you start to sell components?
Going to Japan? Im there and happy to help.