The utilities articles can't be: rig sizing, foil matching, spot filtering. Every formula is public and sourced — a citable fact, not a black box.
Weight × wind × discipline × skin type → the size to rig. Built on the community sizing rules, corrected by our own race logs. The formula is public.
Pick front wing area and mast length for parawing use — weight, level and water state in, matching foils from the database out.
Filter the 82 verified spots and downwind runs by month, wind direction and your level.