Stan! You can't be arsed searching but you seem to be aware of all relevant points. My car is in tip-top condition, never in its 13k miles having a lick of cheap juice.
The dyno and fitters were Falkland Performance Centre. Operated by guys with more experience than you I'll wager.
Why after paying to get Ben's manifold fitted, and it not actually losing me power, would I go to further expense of taking it off?
Lastly, you have done yourself no good with your petulant post. Ill educated, arrogant and ignorant. Why should anyone buy goods from you?