Congratulations, Jeremy! I hope you'd like your Vado SL and get many happy miles on it!
(I know you have Ignored me but anyway...)
You will need to practise it out. To my surprise, it has turned our your Vado SL (depending on the exact specification) might be equipped with a 110 BCD chainring, which could make it problematic if you wanted to go with a smaller chainring. Please first determine whether your chainring would be 110 BCD or 104 BCD (if the latter then no issue to find a smaller chainring).
Not necessarily. I don't think your rides are overly long. As long as you would not ride in Turbo mode all the time, the main battery could suffice. These configurations give a long range and a decently strong assistance:
- 40/100%, where hard or high cadence pedalling gives a lot of assistance but regular pedalling saves the battery a lot
- 60/60%, which is the max assistance for the long range
Of course you would use 100/100% Turbo for any steep climb but then no pedalling on descents.
Bear in mind the Mastermind display can show you the remaining Range, and the Microtune mode allows you regulating the assistance as you are riding (my version of Vado SL has none of it!)
It is a great pleasure to ride a Vado SL in the "clean" configuration, that is, without the Range Extender. You could install a second water-bottle-cage and carry a second water bottle instead, which might be useful in South California
I am all against unnecessary mods, and making the necessary ones only when the need arises. First of all, most of the vibration comes from the e-bike front (but that's handled by the FutureShock). Secondly, it is all about the tyre type and the inflation pressure. If you install Pathfinder Pro tyres (especially tubeless) and run them at the minimum pressure allowed for the rider + e-bike + cargo weight, you'd get as much of the suspension as even the suspension seat post might not be necessary! (Currently, I am very attracted to the idea of replacing my ShockStop seatpost with a dropper post - but it has to be either an electronic one or the one activated by a handle under the saddle. I need the dropper for descents in rough terrain or riding in the sand).
Very interested about your experiences!