This is a link to page 5 from my build. Read through the description a time or two & it should work for you. The main thing is to have a sheet of cardboard big enough to do a full-scale layout, the hatch dimensions, the strut lengths you will use, hardware pieces & a stick for a compass.
Basically it's just drawing a few arcs that intersect as points on your build. There are an infinite number of solutions for every build. Just make sure the layout of the counter & cabinets doesn't change during the build process.
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