In a isometric perspective, done correctly, we should apply a reduction in every edge. That reduction is the same for the 3 edges, and it's 0.816, that you can calculate why, but it's that number. In LayOut, simply prepare a custom scale with that number (1.0 mm = 0.8166 mm). It exist differences between an isometric sketch (no reduction) and a isometric perspective (0.816 reduction on every edge). Now you can print and mesure correctly your isometric drawings. I hope it helps someone.

I have used the left button only until now, is this such a huge problem for you? I have SP 3.2 and scaling the joints with the scaling tool works just fine. Actualy, the models of the joints are made with SU too, so if you enter their group you can also modify them I have not really worked with the gear-tool, so I have no answer here, sry I think they are just some random units with no representation, just as they are used by the integrator. Some real units would be very fine, I think, but unfortunately SP wasn't updated for quite a while Yeah, that happens sometimes, but I lack the insight in the code to say you, what causes it. Better save your model before running the simulation. And don't copy any joints as the integrator can't handle multiple joints with the same adress