What are the units of the values used for settings in the joints?

for servos and hinges; min and max are obviously degrees but what about the pistons and sliders? Are they pixels, inches, feet or what? Same for thrusters and magnets, are they unitless, empirical magnitudes or do they relate to the environment in terms of distance per frame?

I upgraded to the June version and it seems to be working now.

when I try to connect a joint (any joint) to an object, I don't get the correct mouse icon when I press the shift or ctrl key (no +/- sign) and the clicked object doesn't connect.

the models I made last night work fine.

I noticed that when I click the object with the joint using the joint connector, it has a selection box that's both blue and green.

the door tool works OK, but individual joints don't connect.

I also noticed that the joints don't have a controller listed in the UI dialog box. I thought that was automatically filled in, no?

The joints must have some value. A slider ranges from 0 to 1 X the range + the min value.
Can't you access that value to reference in another joint's controller?