Hi amine. MDMA recrytallization is quiet easy, i do it like you in IPA - no problem. Try it with MDEA, you will see the difference. I've read that it should be soluable in IPA, but it is not. You will get a snowwhite IPA solution, but the cryystalls do not dissolve properly. After adding a few drops of water, the solution turns waterwhite and everything dissolves. Even the crystals look totally different. MDMA xtals are big grained and rockhard, MDEA xtals look like MDA, a snowwhite powder, much smaller xtals.
Finally i like the product, it's different to MDMA but i can recommend the turn - much better than MDA (my personal experience).
greetings