[TR] Replacing a TR3A fan

[Joe DeMuth]

I need to replace the fan on my TR3A - it has been wobbling for  
years, I think, and the holes are worn oversize. OK, I quickly found  
a replacement, thanks to this list. But I have a question. All the  
parts diagrams I have looked at show a "balancing weight" mounted  
with the fan. When I took the old fan off, there was no such piece. I  
need to know if it is necessary and how to position it, It is  
mentioned in the TR3 Service Manual, but no explanation as to how to  
position it. The talk in the Haynes manual is downright scary, all  
about factory balancing and such. Advice?