for hull as low as possible (0.4mm used), for legs 0.2mm or higher (0.2mm adaptive used)
Doesn't matter really (20% used)
In case of PLA, superglue was used to glue the parts together. I recommend using some middle-price superglue such as Loctite. In case of ABS, you can as usual use an acetone instead of superglue.
Leg locations are marked with small depression in the hull.