Speaking of BF research vehicles I finished my Treck Farley fat tire bike electric conversion and did some trail riding yesterday. It will really open up some areas for me that I have not been able to get into. I was delighted to note that most people were not aware I was coming up behind them on the trail until I was just a few feet away. That seems to show that it would be easy to catch a BF crossing trail in front of me because it might not hear me coming. Equally delightful was being able to accellerate going up a steep hill just with moderate pedalling to assist the motor. I decided to do a front wheel drive because of simplicity and weight distribution carrying gear on a carrier in the back. The added benifit is that in high torque situations the bike has no tendency to do a wheely. It just pulls the bike through loose dirt and gravel sort of like a front wheel drive car does well in snow. My range appears to be in excess of 50 miles in mountainous areas. Supposedly the battery picks up some capacity after a few charge cycles. I got a 21 AH battery which is large for a bike. That range is both good and bad. Good in that it opens up more backcountry for a day trip but bad if something goes wrong and I cannot make it out before dark. I probably should mount a headlight just in case.