MOOG Memorymoog Plus Keyboard Synthesizer with rare ABD midi upgrade SN 3468

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via this auction

Posting this one for mention of the ABD MIDI upgrade. I haven't heard of it before. If anyone has any info on it, feel free to let us know.

From the listing:

"Vintage memory moog plus with rare ABD midi expan.
-Second only to LAMM modification
-unit fair working condition
-kept in smoke free studio environment for last 20 years
-ABD midi expan provides full midi implementation, upgraded from original midi implementation.
-wood paneling in good condition, overall cosmetics good.
-stable power supply.
-keys work.
-two known issues: loose connector likely causing a few buttons on keypad to not work.
Oscillator 3 not working on 2 voice cards.
Sold as is @ reduced price."

Not at that price!