It is indeed a bit of a Catch 22. I think the best you can do is to answer any questions about your prior polygraph truthfully, but not to volunteer information that hasn't specifically been asked for.

With regard to your knowledge about polygraphy, disclosing the fact that you've researched it and read the information available here could very well result in an arbitrary accusation of deception and/or countermeasure use. I think it would be safest not to disclose your knowledge of polygraph techniques.

I failed a full scope polygraph exam last year with a fed LE agency. Felt I was treated unfairly by the examiner (Was outright insulted and ridiculed), so I am filing a complaint.

In about 2 weeks I have a new CI-only poly coming up with an intelligence agency. 

I have disclosed that I did have the previous poly and the problems to the security investigator and HR folks, but I am concerned about disclosing to the examiner himself at the examination.

Since that dismal polygraph, I have done a lot of reading about polygraphs, including many of the documents on this website, so I have a better understanding of the process.

I am concerned that if I disclose any or all of the following:
1 - I had a previous poly which I "failed"
2 - I am filing a complaint against the examiner
3 - I have read a great deal about poly technique

That the new examiner may view it prejudicial against me. I could be accused of using countermeasures. Or worse, this new examiner could be buddies with the old examiner 

What do folks on here recommend?