Welcome and thanks for creating the entertaining videos! I too am currently converting an Italian bike to e-bike. My version 1 is here: http://vorworxemc.wix.com/vorworx. I am currently upgrading chassis,motor and battery pack as finances allow.
I would suggest using HID for headlight instead of 55 watt halogen bulb... Like this: http://www.ebay.com/itm/Motor-Motorc...item1e9eb38208
I was thinking also of using Android for dash board using something like this: http://www.ebay.com/itm/Waterproof-M...item3f4cbf2968
The android app is where I am going to need help. I would like it to control my BMS/charging program, my speedometer, GPS, and all displays. With the right programming, it could also be used to control the motor... Its a frigging computer for God's sake! Any assistance in this part of the project will be much appreciated! Cheers!!