I had a fretless Roadie 1 back in the dim distant. I fitted a Hollis preamp to give a bit of a boost, and then later the original humbug pickup died -- well, half of it did anyway. So I fitted an EMG-35 in its place, which sounded a lot better I have to say. The neck sadly developed a slight back-bow which meant that, whilst playable, the action was a lot higher than I would have liked, so I moved it on. The fingerboard was the hardest piece of ebony I have ever seen in my life -- I only ever strung that bass with rounds, and in all the years I used it they didn't leave a single mark on the fingerboard at all.
The second hardest piece of ebony I've seen is on the fingerboard of my current fretless... the neck of which was made by Jaydee. They certainly have some good wood.