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1 reply, 2 total
You need Science 40/60/80 to be able to upgrade implants to levels 2/3/4.
Beyond that, there are no other limitations. Something else is broken.
1 reply
Sorry, it was my fault. I thought the "Level" column on the spreadsheet meant that it could be upgraded up to that level. Did not realize there was an "Upgradable" column.

Regardless, thank you very much for your quick response!