I finally managed to drop around to Callum's place and check out my first ever Dingwall, and man, what a great bass! It really does look stunning in the flesh and is the most playable sixer I've ever laid my hands on!
For comparison, I brought around my trusty Tobias Classic 5, which probably cost twice as much as Callum's Dingwall. Through his gear, there wasn't that much of a tonal difference between them, except when you went below low E, at which point the Dinger swept the floor with it!
I did have one question though, what exactly is that rear knob on the AB-Is? It sounded a bit like a passive tone knob, but didn't seeem to be anywhere near linear sounding.
And what's all the hoo-ha about taking around five minutes to get used to the fanned frets? How about 30 seconds?

Thanks again, Callum!
Cheers,
EG