With my Bis, I can live with its electrical and mechanical idiosyncracies because of its relative simplicity. But when someone changes the whole make up of the car, I would not have a clue if something went wrong. In addition, without the knowledge, I have also no idea whether the seller has made all the modifications correctly from the engineering point of view, which will make it safe to ride in and drive. As mentioned, if I had the skills I would know straigthaway, whether the car is fit for the road. If it was not, I would have the ability to put it right. It is a bit frustrating to say the least.