Thanks Bill for your encouraging compliments.
Yep I know the Apollo history. The three Shuttle MLPs were originally constructed for the Apollo Program, known simply as the
Mobile Launchers (ML), with the LUT.
With the advent of the Space Shuttle Program, the three MLs were modified extensively for use with the new shuttle vehicle. First of all ML-3 was rebuilt into the first
"Mobile Launcher Platform" MLP-1, then ML-2 into
MLP-2, and finally ML-1 into
MLP-3.
And I'm building
MLP-2, which was first used for the first Challenger mission
STS-6 (04.04.1983).