Local face coordinate system

[iils-mriestenpattgenrichter]

Hello,
I'm trying to make boreholes on the upper and the lower side of a plate using points in the face coordinate system. But the holes on the lower side are not as excepted. How is the definition of a coordinate system of a face?

Example:
`
val base = workplane("XY").sketch[rectangle(20,10,[centered = false])].extrude(1)

val pointsUpperSide = #{ #[5, 5], #[15, 5] }

val boreholesUpperSide = base.faces[Q > Z].workplane.pushPoints(pointsUpperSide )
.hole[diameter = 1 depth = 0.5
counterbored[diameter = 1.5 depth = 0.2]
]

val pointsLowerSide = #{ #[5, -5], #[15, -5] } // negative y direction

val boreholesLowerSide = base.faces[Q < Z].workplane.pushPoints(pointsLowerSide )
.hole[diameter = 1 depth = 0.5
counterbored[diameter = 1.5 depth = 0.2]
]
`

[iils-parnold]

the z axis of the coordinate system always points in normal direction. So for
base.faces[Q > Z].workplane
leads to this coordinate system

base.faces[Q < Z].workplane
leads to a inverted y axis