I'm glad you found it interesting. It was Valentine4 that got me hooked on learning about Methadone metabolism- on the plus side I know a little more than Wikipedia than before, on the downside I haven't found a viable oral Methadone enhancement.
While I respect Valentine4 just by the few posts of his I've seen, I haven't been willing to test the theory due to poor responses from other Methadone metabolism tinkerers. Taking Ginger,Sodium Bicarb, Tagamet, Prilosec, Orphenadrine, Lexapro, Benzo's, Prozac, then injections of Cyclizine and Barbital to try and make Methadone into something it is not, and wasn't meant to be. If it were meant to be rapid acting, short acting, induce a breatheless rush, etc it would've been born that way

It doesn't matter how much Tagamet and homemade Diconal and god knows what else you eat, it won't make it so.
The only advantage I've found to any of these chemicals in relation to Methadone is that Tagamet (Cimetidine) and probably other CYP3A4 Inhibitors prolong the duration of effects and increase the depth of sedation. For opioid addicts, this makes the feeling well business easier by making a little Methadone go a longer way. Similarly, MMT patients who abuse their takehomes use it to boost serum levels to get through the days they skipped their doses more comfortably.
I wrote a lot about Orphenadrine (Norflex), though I would be interested in trying it, I don't even believe the theory I put forward in the M-G-Spot thread- that the combo via IV or even orally would be some brave new world.
Anyway, the science is interesting. Very few other recreational drugs' metabolism has piqued my interest like Methadone. Other than the joy from learning something new, none of this stuff will enhance euphoria, and may possibly cause harm via discomfort, side effects of individual medications, oversedation-coma-death, etc.
For some reason, the odd day the warm & fuzzies from taking MMT dose on an empty stomach hits me, if I were to consume any of the above mentioned substances, they wouldn't have shown up at all. Save yourself some frustration and don't bother.