LengthParameter stuck on previous default value

[JansenSmith]

in commit TechnocopiaPlant/TendyTheTankEngine@255a4e1
LengthParameter trackDistFromWall = new LengthParameter("Track Distance from Wall (mm)", 500, [0, 1000])
is effectively followed by
println("trackDistFromWall: ")
println(trackDistFromWall.getMM())

but the result is
trackDistFromWall:
100.0

This erroneous value is also reflected in the represented geometry.

[madhephaestus]

This is expected behavior if the first time you created this parameter at 100.

I expect what you are looking for is trackDistFromWall.setMM(100)

Length parameters are stored to a json file, and modified with the setMM() or from an interaction on the screen.