EZ Command Controller Buttons

[plint]

I had to take this apart because the red Stop button was stuck closed.  6 screws in the base and 6 more for the circuit board and the buttons appear.  I loosened the button and screwed the circuit board back on and tested ALL the buttons to make sure they were OK.  I put the base on and now the 6 and 9 buttons are tight.  Loosened the circuit board screws and put back the base.  It's ok now but I can't tighten the base completely.  There's a crack where the pieces come together at the wires.  If I tighten anything too much, some buttons will stick.  I just don't like the open crack.  Anyone have this problem?  Bach man?? 
Thanks