You said about RARDE, what is hard to understand. I don't think you have followed the structural debacle of that organisation before the English appeal courts.
Read back through the threads posted here on this topic and you will see that that is not so. I am very well aware of RARDE's track record in previous cases.
That is beside the point though.
AAIB do air accident investigations, they don't do forensic research on explosives and are not best qualified to work out what type of explosive is what. They also had a lot of work on at the time!
Why RARDE was used and not a n other explosives lab is a good question, but it is not one that you have asked.
I have asked two questons of you in particular that I would very much like you to answer.
i) How do you know there were two bombs aboard PA103? Surely your theory cannot rest on "there were two debris trails therefore it follows that there must, and can only have been, two explosive devices"
ii) What qualifies you to decide which parts of the AAIB report are fact and which are 'written padding'?
I have a whole raft of questions I would like to debate with you about John Parkes, I've only ready his report, you've spoken to him in person.
Unless you can answer these two basic starter questions though it's pointless going further.