OK, well, I had a go at fitting one to an old, tipless cue yesterday and took it to the snooker hall.
It actually wasn't at all bad! I didn't quite get the rounding right, but the 'sound' of the shot was more what I was looking (or hearing) for.
I'll post a pic up later of the fitted tip.
The leather came in a box of offcuts, and is one of the stiffest, thickest pieces of veg tan I've handled.. Almost as stiff as a similar thickness piece of timber!
Thing is, each tip is literally 11mmx11mm, so even out of the offcut, i'll get 100 tips to play around with!