glow gauge/needle question Options

[SVD914]

So i was attempting to put in my new glow gauge thinking it would be a piece of cake. couldnt have been more off. I know im not suppose to take the neeedles off but i found that out after doing so. I read of few things on here like take the needle off and put it back on after you start the car. well that helped, im not going 40 MPH when im pulling out of the driveway anymore but its still alittle off. any suggestions on the best way of fixing this? i dont even have the new gagues in yet