Problems with spacers and gpio-pins

did anyone yet find a good working gpio cable, when using FV2 in an acrylic case ?

actually for me the connector itself is approx. 1mm too wide, so the spacerscrew does not fit properly

Is it the standoff in the middle?
Is it an option to remove it, so you have more space?

Actually it is the screw right to the gpio pins, which is too narrow to using a spacer to the top of the acrylic enclosure. i reverted to following: using a small spacer from bottom and a normal screw to attach it firmly. same on top of the case (not connected to the bottom one, which gives enough space to using the 40 pin connector plug. i now try to find someone, who can reduce (grind) the diameter of the long spacer.