Hi Ian!
My, what a lovely new Sherpa you have! I do so hope it will meet all your needs when coupled with the new BB-mounted electric assist.
While the idea of electric assist might seem "impure" to the cyclist who believes it is all about human power, if that same motor can allow a measure of healthful exercise, getting out in the fresh air, and enjoying things not otherwise possible then it may well be an ideal solution for those who need it. Compared to a scooter, the electrically assisted bicycle does allow pedaling. I was once ill to a point where I might have found it useful and -- who knows? -- might again. The future is not certain for any of us and if a motor assist would allow me to maintain even a fraction of the things I hold dear in the cycling experience, it would be well worth it. I think it can be the ideal solution when desired.
Going back for another look at you new bike, Ian. What a lithe, eager looking machine it is!
Best,
Dan.