Sounds like your MDMA is quite pure. What temperature / pressure did it distill at?
Follow this writeup for the crystallization - very hard to fuck up: Post 513755 (https://www.thevespiary.org/talk/index.php?topic=10164.msg51375500#msg51375500)
(Bandil: "Easy preparation of HCl salt w/o gassing", Newbee Forum)
Regards
Bandil