I did like the idea of the old cable driven speedo, heck I think I have a original bug speedo that I tried to get set up, but I went to disc brake up front and lost the drive, but I could spend the money at get that drive set up for this Triumph rim.
I went to new age stuff. I got one of those GPS satellite speedo's, a low end price one, but they make a combo tack, speed, and fuel I think, or something like that. I do hope you the best on you quest......