Hi Tim,
A possible option might be to adjust the X Fixed Scale of the first Segment as needed, by for example the Conditional Operator (Segment X Counter Equal to 1), but most probably the easiest and precise way, in this case, would be to add "corners" - vertexes in exact positions and use these to "reset" the position by the Rules > Bevel Mode > Reset. Attaching the modified scene.
Hope that helps.
Best regards,