Originally Posted by OKHIKER:
There most definitely is a good reason but Lionel has not officially offered any definitive statement as to what that reason might be.
From the Lionel sensor track thread:
Originally posted by Santafefan:
The Legacy 990 systems with issues had only newer versions of the *same* part numbers, which caused some issues and delays to the consumer. The newer parts should have worked, but did not. The changes to the code and hardware were such that functionally the Legacy 990 design has not changed, but adjusted to continue to meet specifications. Engineering was responsible for the direction to make these parts work, and they were very, very, minor adjustments. It just takes time to research and correct, hence the delays. We are truly sorry for the delays, we want the product to be right.