I just installed planetary bases systems, Near Future Tech, cyro rockets, and all the other stuff that Nertea makes, which come bundled with a bunch of probably outdated config mods like b9 part switch, dynamic battery storage, etc. I am in 1.5.1. Have a feeling it's because of the b9 part switch thing that lets me modify the tanks' contents conflicting with something. I don't know how to make it stop. It stopped randomly once but it's happening again. It might be a hotkey that toggles this behavior. It's also freezing a lot, once every 0.25 seconds, staying frozen for a full second, as I hover over the big fuel tank/decouplers.
I have editor extensions redux, as well as a lot of other mods I had prior to installing Nertea's stuff and PBS.
Please don't come here to give me a lecture on how bad 1.5.1 is and how stupid I am for trying to use certain mods at certain times for certain versions or whatever. Just help me.
I've noticed that I can use different levels of symmetry on a part that I placed on a rocket with a specific level of symmetry; i.e. I placed a decoupler with 3x symmetry but when I put the fuel tank on it with 2x (the only symmetry level I can use for fuel tanks at the moment for some reason) it has radial symmetry about the single decoupler that I am hovering over with the part. I have tried pressing F and it does nothing.