I've been reading about the intended feature of air breathing engines using up all liquid fuel in the SAME STAGE, but I believe I have a bug here where I moved my LF+O rockets into a different stage than my air breathing engines, however the air breathing engines are STILL pulling liquid fuel out of the LF+O tanks. This is extremely annoying because the spaceplane uses Whiplash and Nerv and is full of liquid fuel only tanks, however there are 3 radially attached solid fuel boosters with radially attached LF+O boosters attached to the SRB's (so the liquid fuel would have to travel through 2 raised radial decouplers AND solid rocket fuel ??? what ???). The staging is supposed to go: Ignite air breathing engines (while still connected to the support towers, waiting until thrust rises), disconnect support towers and ignite SRB's as well as the liquid fuel boosters simultaneously, liquid boosters drain and release, SRB's drain and release, Whiplash engines flame out, Nerv rockets ignite. Simple, right? Well, no matter what configuration I have tried (attaching via decouplers, stack separators, nosecones, docking ports, structural pylons, switching the stages of the engines, etc) I am still left over with unused Oxidizer in my LF+O tank. Yes, I know air breathing engines ignore crossfeed. This is a bug, hate to break it to you. It's a game breaking bug, making this game unplayable for me without a complete redesign of the spacecraft, and inability to use the air breathing engines concurrently with solid and liquid fuel boosters. I have literally tried every imaginable configuration, even connecting a radial decoupler to a stack decoupler and it still drains the LF from the LF+O tank. It's really quite simply a waste of oxidizer, and mass. In the mean time while devs work to fix it, are there any mods that are available for version 1.0.4 that will allow me to use normal fuel flow ? Or am I stuck having to deal with the inefficiency? Thanks for your time.
