[Double Venom]

Coosawjack,

Classic Gauges are their own company. If you do a google search you will find them with a phone number. As far as the speedo' fogging up.....turn on your parking lights! Only the most exspensive and fine gaugees are totally air/water tight. The fogging is quite normal due to humidity or moisture present. Turning the parking lights on for a while will heat up the inside of the gauge and dry out the moisture thusly fixing your fogging problem. Unless of course you have a tremendous amount of water getting into youir gauges!
DV
PS. Erratic tach- almost always ends up being a ground or the feed wire is getting crossed/stray electrical interference from speakers, hi-volume amperage bleeding across, etc. Do you have a radio? IF so can you hear a high pitched whine co-ordinating with your RPM through the speakers? Windshield wiper motors close to the tach wire can really raise havoc.