help! gauge calibration and gauge needle removal
 

help!!!! is there a special tool or method to remove gauge needles? i was trying to recalibrate my tachometer because the previous owner installed white face gauges and messed up the calibration but when i pulled it off, the black plastic piece of the needle broke... i tried gluing it back together and when i put it back on it seems like the glue added just a slight amount of extra weight to the needle that the tach is even more inaccurate. i'm going to try to get an extra needle but does anyone have any suggestions on calibrating the tach? i know my car idles around 800 rpm according to an external reading but when ever i take off the needle and try to put it back at 800 rpm, it seems like there is a little bit of "play" on the tach and the reading will drop a few hundred rpm where i place the needle. for example, to get the needle to actually "settle" at 800 rpm, i have to initially place the needle at the 1300 rpm position and then once on the tach, the needle will drop to 800 rpm. i don't know if it's just the slight added weight by the glue or if my tach is really broken or what. any help would be GREATLY appreciated! i need to get my car running again...

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