4/9
7. Install P2 to P1, and Fastening it with nut N1.
8. Slide F1 into P2 and cross with F2.
As described above,
please adjust the S1,N4 and pulley W1 in step 6 repeatedly
to ensure no clearance between pulley W1 and profile F1.
At the same time, it should slide smoothly.
9. Install P3 and fastening it with nut N1, so the central cross
structure is finished.
10. The central cross structure after completion.