So I was in sandbox mode test out, how to setup Satellite array I noticed that my Rcs ports on my launch craft where pulling monopropellant from my Satellites tanks first and not the one nearest to them (they changed it to this in 0.23.5 and I did not notice) and yes I know you can disable the tanks so that fuel can not be pulled from them.
I when't back to the VaB and did some testing using This and found out that 1. Monopropellant is pulled form the upper stages first 2. Even though you can do so, changing the fuel flow priority on monopropellant tanks, does not change any thing
and 3. Monopropellant does not obey the crossfeed rules on decouplers.
So I had some ideas for a mod that would change this and if knew how to do so I would make it myself, but I do not, so I throw myself upon the tender mercies that are the great mod makers in this community.
(these ideas are listed in what I believe would be the most useful to the least useful)
Idea 1. For stock decouplers create an option in the right click menu, i.e when you right click a decoupler there would be an option below crossfeed, that would say Monopropellant Crossfeed and when you clicked it, it would enable/disable monopropellant crossfed and would prevent any rcs ports below the decoupler from being able to pull fuel from the tanks above the decoupler, forcing the rcs port to pull fuel from the neatest tank it can.
Idea 2. Make it so that the fuel flow priority system works for monopropellant tanks. i.e you could set, for example, a satellites monopropellant tanks to -1 and set the main crafts monopropellant tanks to 0 and it would pull fuel from the main crafts tanks first.
Idea 3. Change how monopropellant works back to how it was pre 0.23.5, which in and of it self has some problems and can annoy you just as bad, why am i even listing this one, oh well.
I am not sure how difficult this would be, but I do hop someone takes up the challenge, if anyone has any questions leave a comment.
Thank you for reading this far , Kage Sendo.