I'm a dum-dum in CE, but a persistent one. Works on Infirmary (sometimes on Detention, but not always). Made for 1.1.0-dev-6.1; you can now overload on presents, cos there is a safety net preventing yoo from pulling more than you can, but hand size values above 6 locks game itself (although you can quit to title and restart).
Recommended usage:
Set Stamina1 & Stamina2 to 100 and lock.
Set Hand to 3/4/5/6.
After first day (just to make sure it works) estimate how much you have presents and set to ~18, if it matches with value in Presents group (you can change any of 12 that matches with presents value).