PMK-gly is to MDMA-HCL as PMK/MDP2P is to the freebase of MDMA
This is not an appropriate analogy given that PMK-glycidate is a precursor to PMK but MDMA-HCl is not a precursor to anything (aside from having the most boss time, assuming of course, that you are lucky enough to get racemic MDMA-HCL and not some other isomeric combination); the HCl salt of MDMA is obviously produced from MDMA freebase at the very end of the process.
no 2,3 MDMA and 5-Methyl MDA are examples of known structural analogues -- with no monographs in the common GCMS database -- that have the same mass and functional groups of MDMA different taste = different salt -- or different substance
The forensic government laboratories cannot afford to misidentify seized drugs in drug prosecutions; if this routinely occurred, it would bring the entire system into disrepute. The mass spectra of the chemicals you have mentioned would not be the same as the mass spectra for MDMA. If these chemicals were present in pills, then the laboratory would need to identify them precisely or, if they had no reference data for such novel compounds and couldn't identify them, then the substance would be reported as not containing ANY identifiable illicit or prohibited drug. They cannot just pretend it is MDMA, even though no one else is going to know any different.
What you have stated also ignores the recent data that we have from various government agencies, such as the United Nations, Australian Crime Commission and the European Drug investigation agency (the name escapes me). The reports put out by these agencies have all identified PMK-glycidate as the most common MDXX precursor seized worldwide. What we would have to agree on is the MDMA analogues that you mentioned above are NOT being manufactured from PMK-glycidate. The very issue being debated is a common phenomenon reported by ecstasy users worldwide. It is no coincidence that the most prevalent MDMA precursor over the past several years also appears to be the source of the most prevalent problem/issue/complaint made by ecstasy users over the past several years.
One needs to approach this issue like a circumstantial case in a criminal trial - you don't look at the evidence in a piecemeal fashion when attempting to find an answer to this problem, an answer which can only be determined through inferential reasoning; rather, you need to examine all of the available evidence (from all of the different sources) in its totality, before attempting to draw inferences or conclusions which might be capable of providing a reasonable and logical answer to this conundrum.
I already posted regarding how bitartrate/tartrate (35%/50 will reduce the amount of MDMA per mg -- same thing with citrate
There is evidence that the citrate and (bi)tartrate salts are metabolized differently as well
Again, when looked at in isolation, this is an entirely reasonable theory which could account for potential differences in subjective effects and would certainly explain the sudden massive increase in the amount of "MDMA salt" being pumped into such pills. However, if this were the case then all of the discussion about these new "Super" or "Mega-Dosed" MDMA pills in the mainstream press, on user web sites such as this and in the many government reports, would be completely fallacious and utterly pointless. If the "mega" dose of "MDMA" in these mega dosed pills is simply the result of a comparatively heavy MDMA salt like MDMA-citrate or MDMA-tartrate being used, where the reported dose of a pill is in fact the total mass of the salt pressed into the pills, then such pills would in fact have an effective MDMA content which is relatively similar to the more traditionally dosed MDMA tablets made from the MDMA-HCl salt.
After applying a modicum of common sense it's obvious that the above situation has not been happening. Therefore, the lab results for these mega dosed pills are either only reporting the quantity of MDMA freebase (with whatever corresponding inorganic anion making up the other half of the MDMA salt molecule not included) or the labs are in fact quoting the amount of "MDMA-HCL" in the tablets, because MDMA-HCl is basically all that there ever is. I have noted that the results from European labs seem to specify MDMA-HCl almost exclusively in pills containing MDMA. However, the Dancesafe results do not mention which type of MDMA salt it is at all. Australian Government laboratories appear to adopt the Dancesafe approach and therefore rarely mention what salt the relevant drug is present in, unless this is somehow relevant to the tests being carried out (which it rarely is).
As I have already explained in one of the other threads started by shugenja on this topic, I have personally read a report from an Australian government laboratory which confirmed that one of the better known mega dosed European pills from last year was found to contain ~ 210mg of MDMA at a purity of about 55% (so 45% of the pill was inactive binder/impurities from the reactions etc). The report did not mention which MDMA salt was found in the pill. The reason for reporting this pill in the first place was to highlight the discovery of an MDMA pill in the Australian market which contained 2-3 times the MDMA content as MDMA pills commonly found in this country. These highly trained analytical and forensic chemists, with immense experience in all types of illicit drug analysis, are hardly going to report such a discovery if the pill contained a "mega" dose of MDMA-citrate, which whilst interesting for its novelty factor, would not have a markedly stronger EFFECTIVE dose than the typical MDMA-HCl pill, and certainly wouldn't warrant the laboratory issuing a report highlighting obvious concerns about this pill's strength as opposed to its composition (which aside from its size and the effective dose of MDMA which it contained, was otherwise completely unremarkable).