My deam banjo for custom build

I just got back from Clift top and saw some super banjos for sale from many luthiers. 

However none of the banjos made me pull the trigger and buy one.   So I decided to make a list of what I want in a banjo I get custom built for claw hammer /old time play.  I realize what I want may not make a good banjo.  So I am asking the group to critique my list.

1. A scale

2. 12” maple ply rim. Dobson tone ring

3. Walnut neck

4. Fretless or flush fret to the 5^th fret .frailing scoup

5. Renn head

So please give me the pros and cons .

thanks