Sorry, but I'm finding it hard to believe HMRC are going to just wipe their noses and write off a debt like that on the evidence supplied by the OP in the thread you linked.
I notice someone else tried the same thing on later in the thread and got this slightly more predictable result...
Well that's your prerogative, but I think if you were to say that the 1000 success stories on those boards were made up, that's a bit silly.
I've been around the block with this stuff, both sides of it.
It's a bit like recreational drug use.
The mainstream media will tell you it does nothing but harm.
The main characters promoting it can be quite bizarre people and others are the type that are driven to it through desperation.
There are disaster stories even amongst experienced practitioners.
There is reckless use from people who really have no clue what they are doing.
There are people who take a pill and then think they can fly and are immune from any threat.
There is a lot of stuff that is just junk and no-one should bother with.
But set against that the reason it's been spreading is that people are getting in many cases the results they intended with it. I've seen some first hand.
I've seen guys go totally reckless with it and had to intervene to save them.
I've also faced down a magistrate who was threatening me with imprisonment if I didn't confirm my name and walked free from the courtroom (for that, I did a vast amount of research and do not recommend anyone tries it at home)