Just over a week ago i had half an A with a score, then did the other half along with a whole A without score about 40 mins later, felt the 1st half come on before did the rest, felt the same as 1 i had 5 weeks ago(in halves 50 mins apart), just had me peak harder due to taking more. Had someone tell me 18 hrs after that I looked like I was still peaking(big pupils, pale clammy skin). One of my friends throws up for 45 mins after taking a whole(he does on any good pill). I had no hallucinations, but MDMA is a mild hallucinogen. The best way to test for MDMA is on an FTIR.
Crushed or whole pills ingested wont change the rate of absorption, it's to do with the actual particle size(we're talking micro or nano meters), try putting a whole pill into HCL(what ur stomach liquid is) and see how quick it dissolves, a whole pill is just an agglomeration of tiny particles. A capped pill will change things depending on where the cap dissolves, MDMA is very lipid soluble so most will be absorbed in the stomach and the rest in the small intestine. The cap could be acting like a slow release membrane, hence the less of a come down that some of you have posted, this would flaten the concentration curve and give you a smoother high, but all depends on what the cap is made of.
You will always get MDA produced when you manufacture MDMA, unwanted side reaction, depending on knowledge will depend how much. The best way to test for MDMA is on an FTIR(250000+ AUD). There are techniques to produce ultra-high purtiy MDMA, but these are in million dollar labs, which are used to produce ultra expensive drugs(circa 30000 AUD a gram) and are mostly in R&D stages. My specialty of 5 yrs of uni is in drug delivery and making legal drugs more efficient, so i know what i'm talking about. That's all I can be bothered writing at 2am, hope someone finds it useful.