I noticed that Drones happen to have a FORT stat on the Mechanic pregen, as well as them using a Summoner like table to measure their stats. My question is how does one measure the stat that increases a Constructs Fortitude? I couldn't find anything in the core book that explained it and if they have no CON, then do they have a penalty, is it treated as +0, do they use another stat like Undead, or could they even be poisoned as things like creature immunities aren't out yet?