I meant to say if you have a Purion to start with, you'll need the Intuvia base in addition to the Nyon and the Nyon controller.
To find the Nyon on ebay just search "Nyon Bosch". Then search for "Nyon controller". Both items should total just under $200 with shipping. The final search is "bosch intuvia display holder"
Not having ridden a Powerfly, I am not prepared to recommend performance tweaks. Also the sprocket and cassette mods I made on my Cube were to a Diore 8000 11 speed.
Thanks.
I need to ride it before I can really tell if it needs upgrading. My LBS has a no-hassle, 30 day return policy.
I wonder if I can ride it for 1.25 miles up a continuous 2% grade without power? That would be the worst case for me, if the battery were inoperable.
I could get the R&M Super Charger up to 27mph from a dead stop, in the parking lot, with the power off. So, the R&M ride like very nice pedal bikes, too.