Started to work on the third leg today. Inside the body four aluminium pipes guide the platform where the third leg will be attached to. The platform needs more stability going up and down, so extra gliding holes will be placed somewhat higher around each pipe in order to make sure the platform stays horizontal when moved.
The third leg has two casters, but the ones I am using now might be too big. Either they will be replaced or the dimensions of the casing around them can be adjusted. I haven't found smaller casters yet, aside from the metal ballcasters that are too small. Maybe I can build my own using the spheres from ball-mice.
I need to mount the side legs in order to determine the best height for this leg.