I made 33 Keycutter Tonics and used them on 165 keys. I transformed 15 each of the 11 different available key types (RGT, YPT, TWT, GWC, BYC, POC, OBS, PRS, GOH, TRH, BWH).
Results:
28 RGT - Red Green Triangle
17 YPT - Yellow Purple Triangle
31 GWC - Green White Circle
22 POC - Purple Orange Circle
35 OBS - Orange Blue Square
32 TRH - Teal Red Hexagon
(I'll post full details in the first comment to keep this area clear)
Has anyone else done any experimenting with Keycutter Tonic? From these results, it looks like the potion is actually more useless than we originally thought... i.e. not only are the results random, but only the less-valuable keys are produced :)