Dear Tig:
Yes, I really ask for Zorro+SectionCutFace within each group,now SectionCutFace can create independent group-face,and Explode its group to get the faces,
really,no need group-face,only need face to inside of before group;so with the help of SolidSolver;
Maybe you have a good idea,Tig,Can you help me?
My English no good,but i love sketchup,and Love everybody in here.
Thanks again!