G'day Alan, I have one. It works OK but does waver a bit. The only problem is the cable. Different fitting at the speedo. I bought one of their cables which was too long and shortened it. The hard bit was making the end of the inner square. I silver soldered about 1" of the end and ground the square. I don't know if an inner out of an original would fit or not as I didn't have one. It doesn't have a trip meter either.
Cheers