>
> Op amps are not my area of expertise, external compensation capacitors
> were new to me, so I've been doing a lot of reading up on the details.
>  I'm still working out how much of the circuit works.  Any suggestions
> would be appreciated.
The placement of the main pins seems the same as a 741.

I wonder if you could find a more modern op-amp that meets the 
performance requirements without requring any external offset null or 
compensation circuitry and can therefore be dropped in (possibly with 
some of it's legs cut off).
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