I've injected MDMA pills before, and separating the binders from the MDMA isn't too hard.
It's just a matter of using a decent amount of water (2mls, meaning you'll need one of the larger 5ml terumo replaceable needle fits), and after you've mixed it up thoroughly to dissolve the MDMA, just let the mix sit for a few minutes so all the binder and most of the colour settles on the bottom. Using a filter on the tip of your needle, only (and carefully) draw up the top layer, and lick off all the binder to get whatever goodies you've missed. Then you should have a virtually transparent binder free MDMA mix ready to shoot.
===> What is feels like?
When I tried this, I used a very strong Blue Heart pill from over a year ago.
Straight after injecting and pulling out the needle, I was put through the most intense and confusing rush (not necessarily good) I'd ever felt. I remember being completely disoriented, forgetting who I was or what I was doing in that place. I stumbled around for a bit, trying to make any sense of the situation.
I looked down at the equipment, and was shocked to see someone had been using a needle. It was even more daunting to realise that after a little while that it was my equipment. Slowly i put two and two together, and came to the false conclusion I'd just had a killer dose of ketamine IV, as what I was feeling felt nothing like MDMA orally. Hardly euphoric, mostly disassociative. Layers of surfaces appeared to move about, and there was that peculiar ringing in my ears I always associated with nitrous. The buzz lasted about 2 hours, and tapered off slowly over this period.
In summary, the experience was not good. Far too intense to enjoy. I remember telling my friends they'd sold me ketamine pills, but they were certain it was MDMA.