Modding preamp on Little Giant 1000

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The opamps are all surface mounted so it's a bit difficult.
I'll look into the 1642.
I think there's room for polypropylene caps all over. The pins just need to be manipulated.
Thank you.

How important is it to use genuine Texas Instruments?
Genuines are too expensive for me. It's $8 a piece.
 
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The opamps are all surface mounted so it's a bit difficult. I'll look into the 1642. How important is it to use genuine Texas Instruments? Genuines are too expensive for me. It's $8 a piece.
Less expensive (about 1/2) but almost the same performance are the OPA1652s--just half as fast (10 vs 20 V/uSec Slew Rate).
Only $2 here:
OPA1652AIDR Texas Instruments | Mouser
 
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