I took my first ride on my Rover with a new NuVinci 360 hub yesterday. I really, really like NuVinci, and am very pleased with the results. My main reason for the conversion is the shifting pedal pause needed on the SA. Hated it! That's now a memory. Shifting is smooth and I can maintain my cadence when rounding cul-d-sacs in my neighborhood.
The conversion was less difficult that I expected. Thanks to the deep dropouts on the rear wheel and the sliding boom, I did not have to alter the chain length or chain tubes.
On eBay I purchased the NuVinci 360 ($200), 140mm spokes ($18) and a truing stand ($48). I found a nice 20" rim and a 42t chainring at my LBS ($5 each) and 10 foot length of cable sheath ($10). Since this was my first wheel, It took an entire day to build it to my satisfaction. Preserving roundness of the wheel without wobble takes a great deal of patience along with viewing multiple YouTube video instructions.
The OEM 32t chain ring was too small to reach my usual 12MPH cruising speed. The LBS did not have a 40t that I could fit on my crank, so I had to opt for a 42t. I plan to purchase a new crank set with 40t after the Christmas bills are paid. In the mean time, I decided to drill and bolt the new chain ring onto the OEM gear. Careful workmanship and a drill press made it quite simple to do.
I am on a two-week hiatus from triking/biking under doctor's orders... prostate issues and doc says 'stay off the bikes' for two weeks beforehand. I have been using the time to convert my Rover, tune up my Giant Revive DX (Nexus 7 hub) and my very light weight Fuji Regis(7 speed derailleur).
I will answer questions and take photos if anyone needs more information.