Seeley, yes I do know Paul. He sold his Vincent before I bought my first one, so I dont know him well.
He is a very talented welder and fabricator and was the founder of Brodie mountain bikes, real high end rides.
His experience with his Vincent was just about dead opposite mine. He will freely admit that he had neither funds nor the ability at the time to properly build the engine, so it was entirely unreliable for him.
A friend of mine owns the bike now.
Hobot, these ligtweight race batteries get charged from the alternator just the same as with a common lead acid job.
Aside from the advantages of light weight and tiny size for a given amount of power, the maker also states that these batteries can be left without charge for a full year and will only lose 10%of their stored power. One more advantage is that they can be mounted any which way.
Glen