Sorry to be picky, but according to this list there are 54 tonics (19+18+17=54) - probably because theres only 16 listed under engineering but its written as 17
Other than that, brilliant list.. I'll be more thorough in my next playthrough and make sure I note down where I find any tonics
Have just been buying and making them as and when I can so far, only forgot to do the 1st photographers eye, doh
Hehe edit number 3, found the places for EVE link & Medical Expert (the Fisheries Gatherer's Garden & the Arcadia ones, respectively if anyone needs em
Yay for 'Achievement Unlocked'