I used Rubber cement .... it's lasted overnight so far
Good thing about rubber cement is that even though it might be a tad messy if you're not careful with it..... it's very easy to clean up. Rubbing w/ the finger = gone. Even if the rubber cement doesn't work for me I still have to take the gauges back out later.... b/c I've yet to find a decent 115mph speedo deal on here.... going to take the pic and make one myself tonight more than likely.
What's wrong with just super glue? Dries in seconds

-Bud