I'm not sure how I missed the previous message, but it's not a great problem, as one can easily replace the figures in my code with the corrected ones.

The next question at hand is what diameter are the stand-offs (corner rectangles, center cylinders) and the holes within?

Use the lower left corner of the box, the outside point as a reference for the center of the holes and measure x and y from there. Also include height for obvious reasons.

I'll modify the code I just placed to match the information provided and re-post, as it's not going to be particularly large.