from build123d import *

densa = 7800 / 1e6  # carbon steel density g/mm^3
densb = 2700 / 1e6  # aluminum alloy
densc = 1020 / 1e6  # ABS

with BuildPart() as p:
    with BuildSketch() as s:
        Rectangle(115, 50)
        with Locations((0, 0)):
            SlotOverall(90, 12, mode=Mode.SUBTRACT)
    extrude(amount=15)

    with BuildSketch(Plane.XZ.offset(50 / 2)) as s3:
        with Locations((-115 / 2 + 26, 15)):
            SlotOverall(42 + 2 * 26 + 12, 2 * 26, rotation=90)
    zz = extrude(amount=-12)
    split(bisect_by=Plane.XY)
    edgs = p.part.edges().filter_by(Axis.Y).group_by(Axis.X)[-2]
    fillet(edgs, 9)

show_object(p)
# debug(s3)
# debug(edgs)


# got_mass = p.part.volume*densa
# want_mass = 797.15
# tolerance = 1
# delta = abs(got_mass - want_mass)
# print(f"Mass: {got_mass:0.2f} g")
# assert delta < tolerance, f'{got_mass=}, {want_mass=}, {delta=}, {tolerance=}'