STEP 2: MIRRORING (with 2 methods)
1 A. By entering data: MIRROR: select rim
to 1st point enter "@(radius)<180"
to 2nd point enter "@(radius)<270", delete old: "N"
1 B. By clicking objects: MIRROR: select rim
1st point: select midline on 1
2nd point: select 1 again; delete ols: "N"
2. Complete upper left line (use F8 then grips to join to rim and midline).
Show grips by clicking on objects; then join lines by dragging an red
active grip (hover over it) and overlapping to another grip.
3. TRIM overshot upper/mid lines
4. Check joints (w/grips) in circled area;
it is essential for hatching that these lines fit.
Continue to step 3