Yes the fluid depots hold 20k and a drone 1k or 2k
I think its only work with more tank-depots
(its true that the genreral max. storrage space for the Dronetanks are a little to smal)
If only a hand full drones work is a problem for lomnger distance for you right?
But a much bigger problem are the loops from output to input for me. I test now the passive depot (its a seperate extended mod for the transport drone mod). There must be a passive Tank depot but there isnt one. ^^ EDIT: the reciep nedds stuff tha are long away for me ^^. so i must waste the fluids. and can not tested.