I’m starting to think that the really bad fast crash certain people are experiencing is caused by the trace amount of methanol mixing with water in the solvent creating a strong anti solvent effect . Depending on solvent tank temperature there could be trace amounts of water mixed with methanol and this is preventing it from freezing like it normally would if it was just butane . All it takes is such a small amount of water and the thca will fast crash . We all know this from back in the shatter days having slabs nucleate from small amounts of moisture . I have also seen people mist freshly poured Pyrex with water and have dry sugar done in 4 hours from pour . This would also explain why some people replace with fresh solvent and it temporarily fixes the issue . I think this is the cause of the rapid crash in the collection pot and when all the thca just drops out within 15-20 mins of pouring .