P.I.M.P & S.L.O.P.
From analogue files P.I.M.P or, "Pi Is My Pal". Those designs which required pi (3.14159) to determine film travel (circumference) and focal length (radius). In other words, the panoramas.
(AND) S.L.O.P. or, "Stupid Little Obsessive Projects" (self explanatory).
'Most all of my pinhole designs are equipped with apertures from Pinholebilly at pinholeedun.com. That good-ol-boy drills the tightest holes east AND west of the Mississippi.
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