Normally I stick with the cheap-n-easy mechanical speedo's ~ these electronic ones can be finiky.
Would have gone that way, but I was unable to find these gauges together as a kit with a mechanical speedo.
I think however, I may end up replacing the speedo with a mechanical unit. Autometer says my unit needs to be sent back for inspection. I'll give it a whirl once, if it fails when I get it back, I'll switch to a mechanical unit.