Just received permit for this 30'x 30' residence (5 level) which will be constructed using insulating concrete forms for walls/decks. With high elevation off of street below (60 degree slope), leveling off flat at the top (rear of property), I will be excavating down 21' and planting a two level foundation in the hole. One side (east) will be garage access via a tunnel. The other 3 sides, (north, west, south) will be available for the planned ground loop. With a 4' wide construction path at footing elevation and a 4' high soldier pile wall holding base of sloped grade, then sloping angle of repose grading at 60 degree to top grade elevation. As grade slopes upward, more area in width becomes available. With all this, I want to install multiple slinky loops at various elevations starting at lowest elevation around foundation base but not sure how this may be configured. Back filling as I go up and out. I have the manuals from years ago at IGSHPA and I'm confident of building the loop and installation. I was hoping to hear from the group here as to what you see with the layout, pitch, loop diameter, pipe size and production. I am designing backwards here and will conform the mechanical to fit the loop production. My primary purpose is to fully utilize the cut and fill it with loop according to rulebook. I'm interested in knowing what production in tons may look like with design. I will figure supplemental if needed later. I'm attaching 2 plan views for reference. Please refer to shaded area on site plan depicting outward grade slope from foundation. I plan the headers at the northeast corner of foundation. Location is Long Island, New York. Ground soil is clayey sand.