I recently did two BBS02 installations: One on a TerraTrike Tandem and the other on an Electra Townie. Both installs were relatively easy considering they were my first. The Townie install went quite fast at under 3 hours including the making of a battery to motor cable. The tandem install was a bit more involved because the spread of the handle bars and the position of the display exceeded the length of the provided harness. I made alterations to the harness to allow for these conditions. I finally decided to use Cat3 or Ethernet cable to make the modifications to the harness.