i'm a new backer and i sincerely apologize if this has been mentioned already but i could not find a topic specifically about this so i decided to post anyway. Why on earth are the building hotkeys not mutually exclusive from other hotkeys????? A system like the one implemented in starcraft and other RTS games where pressing B opens up a build menu BEFORE the building hotkeys are accessed makes infinitely more sense then a system like this where hotkeys overlap. At present, it is incredibly frustrating to try and create a set of hotkeys for buildings that even make any sense at all, as trying to set M for metal extractor or B for bot factory or even A for air factory all overlap with fairly important commands. Is there a specific reason that this has not been fixed??
You should check out hotbuild2. Also, you should remember that the game IS NOT COMPLETE. There's lots of stuff that needs to be worked on that is a MUCH higher priority than this. Especially when there's such a good mod that does this better than what you're talking about.
You may want to try out the HotBuild 2 mod, which you can get from PAMM (Planetary Annihilation Mod Manager), check here for more - https://forums.uberent.com/threads/rel-pa-mod-manager-v3-4-0.50726/