I see now what you meant - sorry, I didn’t really take it in fully when I first read the strikeout paras, until I tried it myself.
And I agree, it seems like (another) bug in DCs - they need some TLC and don’t seem to have had much since they were first introduced.
On further thought, I wonder if there’s a difference between LenX (or LenY, or LenZ) in which I set Height = LenX, if one were to use the CURRENT value instead? Not that I quite remember how to…!
On a related issue, I was trying to make a DC for a frame, with an optional number of middle crosspieces. I can easily work out where to put them if there are one or more. But - other than hiding one if you really want none - can you completely suppress drawing an optional subcomponent in a DC? Can you? Or is hiding it the best one can do?
Was just about to use Google, to see if I can find out, but maybe you know?