Volff

I wanted to create a 'puller' configuration - the engines radially on top, all the fuel in jettisonnable tanks below the engines. That way I can have just one set of engines for all stages to orbit and just jettison empty tanks. But I have problems with the fueling order - so my questions are: - can tanks be 'chained' using fuel lines ? - can the fuel be pumped 'up' using those lines ?

As the Mun gravity does not work at a distance, the L4 and L5 cover most of the Mun orbit - you just enter it, and as long as you are out of Mun reach, you should stay immobile in relation to the Mun and Kerbin.

Is there a possibility to hover at a Lagrange point (ie. a point where a relative rest between two massive bodies can be achieved - there should be 5 such points) ? It looks from the behaviour of the orbiting spacecraft that the Mun gravity has a restricted range (2.5 M meters or something ...), and when the Mun gravity turns on, Kerbin gravity is off. Am I right ?