I am in the process of updating the EHBP-09 to make it into a single document and include a few other diagrams, some of which have recently been added to the EHBP-09 topic…I’ll include an elevation.
Regarding your question, the counter height can be easily determined by looking at part #9. It is 30″ so adding the .75″ workspace sheet on top of that would be 30.25″. Perfectly comfortable and non-ridiculous. You could always trim or add to related parts back a bit if it’s high or low for your use. Thanks
BTW – standard kitchen counter height is 36″. The 30.25″ is about as high as a standard desktop, but it is intended as a low work space, not a standard kitchen counter. It works fine and has been built this way countless times.