I'll look into the vacuum distillation, I have a lot of lab equipment, from seeking it out and from random things I've come across in my job I've been able to purchase for steam distilling essential oils.the pma is worse than the methylone so chuck it out.
purifying meth from normal cutters is easy but when you get another active with a amine group in it things get much harder for someone without a lab.
my self I would just vac distill it and it would be fixed in 30 minutes.
a grand or two later and your ready then you have to practice and learn how to vac distil not to mention that the cops will most like be on you like flys to shit if they find you with the equipment.
I understand, is there a different platform you feel more comfortable talking on?ok you need to look into the pressure to bp gradient.
sigma has a nice table so you know what temp things come over under vac.
again not something I can go much into here.