A note of caution is in order here -- the plastic needle has probably become 
very brittle due to years of sun exposure.  Funny story (TR6 Funny -- some 
would be reduced to tears):
I had my tach apart and cleaned, sitting on the counter in the kitchen 
airing out waiting to be reassembled.  I was in the garage taking apart the 
speedo and in the process broke the needle.  I was hot!  I decided to walk 
away and headed into the kitchen for a cold one to take the edge off.  As I 
step into the kitchen, my 7-year old is sitting at the counter moving the 
tach needle with his finger saying "this is neat... dad it broke".  Yeah, 
both needles broken in the span of about 5 minutes.  Don't worry, no harm 
came to the kid....
Dwayne
 
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