After some initial spark-up (pretty uneventful, magic smoke did not escape) I wanted to quickly take a look at the bandwidth. The following results were taken using OPA1664AIPWR as the main op-amp. Note that the spikie phase response is just the foldback from -180 to +180.
25x @High BWL
25x @Low BWL
50x @High BWL
50x @Low BWL
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