Coil ballast resistor on '78 Spider?

[JeffreyOlson@domain.elided]

The P.O. had a Accel SuperCoil installed w/no ballast 
resistor.  I just had the distributor converted from 
dual to single point.  

A few days later the coil failed (probably unrelated!) 
and I replaced it with a old Bosch Blue Coil that was 
found rolling around the trunk.  Not sure why the P.O. 
changed coils in the first place but I suspect it was 
to 'fix' a cold-start problem via the 'band-aid' method.

Car starts and runs fine as before.  According to the 
popular catalogs, the Bosch Blue Coil requires no 
external ballast resistor.

However, my mechanic suggested I find an old 'bullet-
proof' Marelli coil w/external ballast resistor to ease 
starting and save wear on the points(stock set-up).

The external ballast resistor is also available 
separately.  Is there any need to do this or should I 
leave the present set-up?  

Suggestions?

Thanks!

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