Has anyone used the GPS speedo/tach gauge from Legendary-Motorcycles?

[72texas350]

I'm looking at getting a GPS speedo for my '78 CB750 project and was looking at either the speedo/tach combo from Legendary or just the speedo it self form them. I know all I have to do for the speedo is hook up the power. I am assuming that I would need to get some kind of converter to go form mechanical to digital in order to use the tach though.

Where can I get a converter for my tach if I decide to go with the combo unit?
Also, if any has used any of the gauges from Legendary could you let me know if you are happy with it or not?

 

[alzcbz]

A lot of the aftermarket digital tachs use an inductive wire you just wrap around your #1 plug wire. You will have to come up with some sort of block off plug where the tach drive cable went into the engine. Not sure what the 750 uses.