In my opinion you will not be happy with any of the answers....Which one...Which one...
Most people would be willing to lend out a very expensive razor to other members who have a little time in the fourm but arter two days or so is asking too much of anybody. Even our pass arounds are limited to members that have been here some time. PIn my opinion you will not be happy with any of the answers.
The only way you are going to find all the answers to your questions is to buy the Feather ASD-D2 and see for yourself. Like all the people that replied to your posts, already.
That will answer all your questions and eliminate all the confusion.
Oh, the above or, if someone would lend you a Feather for a try out.