MAS "medium cure". Same old resin, new hardner. I posted once that I have never had a batch not go off, one time thought I might but added heat cured it. The medium is supposed to cure in 24 hrs at 50 degrees. It has been 12 hrs at 52 degrees in controlled heat and 24 more at average 47 degrees ambient shop temp. It's still just a hair gummy. If at another 12 hrs in the house at 75 no fix, i got a problem mix. Abd right now Im so tired I cant string three coherent sentances together but THAT's got nuthin to do with it. G'Night!