Problem.  Part G will not go into part F. Reason.  The inside dimensions of part F are .06 while the outside dimension of Part G is exactly the same .06. Only solution might be to file down the outside of part G. However I am reluctant to do so as this might affect the warranty and integrity of the structure. This is the secon unit sent sent to us.  They are both the same.  HELP.  Donna Royster