One other clarification in case search leads someone here some day: the first picture in this thread is a pump of mine... and it doesn't have the "joke" LDA... it has "NO" LDA.

Not the best picture but you can kind of tell the lid on the LDA is a completely flat plate... no slight dome to it. This is because there's nothing under there... no LDA guts, no nothing. Its off an early Canadian ECO Passat.
The "joke" LDA on the other hand has a slight dome to it and a pin with very little slope... ie ... the slope is a joke! However, at least it has the LDA mechanics and you can grind the pin a bit.
Some day we'll have to make the definite pump identification thread... so many models!