The question is how wide is wide enough?
I've been looking at this, which looks like I could loose 98% of the 'paddle' leaving enough space to mount the headless string retainer and is affordable at about £60.
https://www.ebay.co.uk/itm/184628868144
I need to figure out of its 65mm heel will result in sufficient string spacing at the bridge, I'd like 18mm ... I really need to draw up a design to check angles, spacing etc.
And, despite 97.4% +ve seller feedback, I'm a bit wary of a made in china ebay neck ...
Sam x