@smallfavor wrote:
I see how you avoided overlapping lines by creating a U shape with constraints. Did you use the pattern tool to distribute them?
Next there's an extrusion for the sides but I see no move record. When you create extrusions from the drawing when how did you place them?
Next it seems you extruded all the slates from the drawing and converted them components - yes? I'd originally done the same but I thought creating a component first and making copies would give me an easier time making changes to the width.
Next it seems you created a component then copied and pasted all the base parts into it, made a group and then - what's 'rigid group;?
Then the mirroring plane - did you place that by offsetting it or was that done with the plane along path or what ....?
I see how you avoided overlapping lines by creating a U shape with constraints. Did you use the pattern tool to distribute them?
Yes,
Next there's an extrusion for the sides but I see no move record. When you create extrusions from the drawing when how did you place them?
When creating the extrusion it does not have to start at the sketch plane. It can start and stop at an object, the two blue highlighted sketch points in the screenshot.

Next it seems you extruded all the slates from the drawing and converted them components - yes? I'd originally done the same but I thought creating a component first and making copies would give me an easier time making changes to the width.
That depends 😉 That's the reason I dimensioned only one slat and then use the pattern tool to repeat that profile.
Now when you change the sketch dimensions, the slat dimensions and associated cuts in the rail (or what ever that's called) change as well.
However, the disadvantage is that when you make a BOM, all the slats are called out as individual components, not as one component with a quantity.
You can still only extrude one slat, convert it into a component and then create a component pattern with the same distance as the pattern in the sketches they always align.
Then the mirroring plane - did you place that by offsetting it or was that done with the plane along path or what ....?
The bottom horizontal line in the Base_Rear sketch has a vertical construction line drawn at the middle point. I created a "plane at angle" at 90 degrees. Whatever the width of that rear profile is, that plane will always be at the middle of it, s that's what I am mirroring about.
In general in a parametric design I try to avoid moving bodies.