Fretless Banjo questions

m0rt

So in my quest for a Fretless intrument - I have recently been pondering a fretless banjo. Now I basically know very little on banjos, but looking around there are a few designs and wondered what I should look for?

Bear in mind that this particular banjo would be nylon strung, mostly. What should I look out for and what is preferable? I see tacks and clamps and resonators and so on.

merlin

I used to have a Cümbüs, which is a "banjo" version of an oud. Fretless and amazing but not quite for me. I brought two back from İstanbul the first time I went. They were bonkers and had formica fingerboards and bolt-on necks. 

I bought them and a Cümbüs mandolin directly from the outlet. 

m0rt

They look nuts! Having a look on youtube as I type.

mart

I don't know much about fretless banjos, but I do know that stringless banjos sound better than most other banjos.