[Collins] Help

[John Bowers]

We are building up a 51S-1 from parts we have collected over 
the last couple years.  However, we have a weighted main 
tuning knob that is damaged.  We have been unable to locate 
another knob and so are looking for info on how to repair 
the plastic crown part of the knob.  The knob has the finger 
tip hole feature and the outside half of that hole feature 
is chipped off and missing.  Otherwise it is complete.  Our 
first thoughts are to look for something like black bondo 
used to repair auto bodies.  Sure would like some advice or 
to be referred to an expert in these matters.  This weighted 
knob has a nice feel to it when compared to the unweighted 
version.

Thanks for you help in advance

John, K9UTK