Face perpendicularity and pin

2D plans Sizing
1

Hello, we have a question about the correct dimensioning to use in the drawing.
We had several parts for which we did not know how to quote, the latest one is a parallelepiped part which is put in position by a pin + a groove and then screwed (very classic so far, see in green below the pin housings). We need the red side below to be perpendicular to the virtual axis passing through the center of the two dwellings (green axis)
Vue iso

The only way to quote that we have found is to do as below
Capture

In this case it can work, but we would rather use the opposite logic, i.e. that the red side is a reference face and find a way to indicate that the axis passing through the center of the H7 and the center of the groove is perpendicular to the red face.
If you have any ideas, we're interested!
Enclosed is the document in question.
A+

Example.SLDPRT (141.8 KB)

2

Hello

I think I'd do something like that
image

3

I don't have the dimensions (lazy to redraw it exactly) ... but otherwise, I even think I'd do it for your rating
You place your face in relation to your oblong and then a location of your Ø8H7 in relation to these two references.

So your H7 is placed in relation to your face AND your oblong
image

4

Hello

For me the red side would be your main reference A
Your oblong B is perpendicular to A
Your hole C is placed symmetrically with respect to the oblong B (the middle plane extracted from the 2 faces of the oblong)

As a gift, an excerpt from the Cetim memento (Memento_ISO_2018_FR Tolerancing) for symmetry (similar problems but not with the same orders of importance as you):
image