Just finished my first build. A Trek Verve 3 outfitted with a 48v BBS02 and 20ah premium celled battery. Got rid of some of the junk parts Trek used. Put some Fooker pedals on, a Selle Royal saddle, Thumpbuster LT post. Did install a shift sensor. Also a 44t Lekkie bling ring. My only glitch so far is the rerouted shift cable fouled up the indexing. Prrobably too much slack in the long runs of cable housing. Still fooling with that. Guess i could go with a three speed igh hub and simplify the drive train.