CruzCorp
CEG'er
You could always just note where the tach sits when at a warm idle, it has never failed me before. Just put the needle in when it reaches its normal running temp or after it idles down.
Some More information that will help with gauges and such(Pictures will have the answers)...
I used Red folder tabs(Walmart) and krazy glued them to the back! Find the nice color you want and go all out!!!! Xacto knife helped A LOT!!!! GET ONE cause razors suck!
- amyn
So did you use the xacto knife "knife" and pick it off after you outlined it or a different blade?