Interesting, I am looking at 10 speed 11-46 with a single 46 on the front of the trike. That requires never running out of battery else I will end up pushing the thing home - the last climb is 26:34 or 26:40 depending on how tired I am so 46:46 is definitely not on the cards...I run 11spd 11-46 at the moment with 18 front and hardly ever use the lowest couple of cogs even on the steepest of off road climbs now
Nice if you need it thou