It would seem that you are choosing to miss the point here - after all, if you keep on telling yourself that something is ok, then eventually you start to believe it.
Every fact I've mentioned in my previous post is based on the law of this country.....it makes absolutely no difference that you've done this many times, or that you claim the Police have taken no notice.
After all, we only have your word for this and so far you've failed to explain how you coupled the ZT's brakes when towing it with the A-frame ??
Mentioning one of the largest breakdown services then claiming their van was just a 2.0 litre is completely irrelevent - if you had any understanding of safe towing and the law, you'd know that.
What is important is the manufacturers specified towing weight and compliance with the law relating to whatever type of 'attachment' (e.g. A-frame, bar, dolly, trailer) you choose to use.
Equally, having experience of doing something illegal and getting away with it for many years, does not make it legal, as you seem to be implying.
There's none so blind as those that don't want to see...
