Another question related to trade routes: Are the ranges for Harvesters firm limits? The blurb accompanying them is wishy washy, it says they are ideally meant for travelling six squares. Does that mean it is a hard limit or you can set up a greater distance trade route with Harvesters at diminished efficiency?

Also: Do small harvesters have a range? Thus far I can't get them working outside of a single sector... can they do inter-sector u-hauling?