Thanks Maledicted, got it ! There's a scary looking bar thing that I thought was going to be problematic but it turned out ok.
I had to take the whole thing apart and redo it to fix dead keys but it's working now !
That's great to hear. The spacebar is probably the most finicky part of the Model F, but good luck ever breaking a Model F at all. I own 4 from the 80s and I haven't done a single thing to them besides, as you mentioned, tweaks to how everything is seated after shipping (or aggressive driving). I imagine the foam in at least 2 of them is basically just a powder at this point but everything works, so I don't even care.
Even thinner Costar or Alps wire stabilizers are relatively bulletproof, and definitely more annoying to take apart and put together.