And what about Fac value on this configuration under 31.4

10anchor 20guide 30guide 40 anchor
__/____________-__________-___________/_____
- -

I mean between node 10 and 40 pipeline is restrained
but, should i consider nodes 20 and 30 unrestrained?
10-20 Should i use fac =1?
20-30 Should i use fac= 0?
30-40 should i use fac=1

Best regards
Claudio