1.5" Fishmouth Saddle Wrap Stencil (1.5" onto 1.75", 90°)

Printable wrap stencil for a true fishmouth (saddle) cope: 1.5in OD branch tube joining a 1.75in OD main tube at 90 degrees, centerlines intersecting. Unwrapped cut curve computed from the cylinder-intersection formula with r = 0.75in, R = 0.875in: wrap width 4.712in (pi x 1.5in circumference), max cut depth 0.424in, with a 1.250in straight wrap tail, seam ticks every 45 degrees, and a 1in scale-check box. True 1:1 scale at 96 DPI - print at 100%, wrap, trace the red curve, cut. Pure tube geometry - no vehicle fit involved. Works with any wall thickness (fits on OD). Test-fit on scrap first.