I have 2 Atari 1040 STF, and if I put the IKBD injector, the keyboard ends up a little high and does not let me close the top cover. That's because some components from below the keyboard touch the injector and connector.. Although it's only a couple of mms, since the keyboard is at an angle the difference ends up being big enough that I cannot close to top cover correctly.
So I did 2 things: I removed the black plastic piece from the injector (where the keyboard connector goes, see picture - this lets the connector fit a little bit deeper), and cut a corner of the injector board (so it does not touch the keyboard components). Now it closes and works perfectly!
Hope this helps!
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