The Joint Pull Push Tool is what i used for this sort of actvitiy. Have you tried it?

http://sketchucation.com/pluginstore?pln=JointPushPull

@olishea said:

lol Tobobo:

He was thinking that the floor was opening for a wall of death or circle pit.

Fox News

http://youtu.be/-_zF7nbEvwY

Best Response yet

http://youtu.be/A5Gg7gdk5qk

http://youtu.be/mV2xjiTWdqY

Amazing!

@frederik said:

It even looks great when rendered...

That's great

Thanks mate!

@tig said:

Because the author allows future changes by others, I have made v1.2 compatible with all SketchUp versions - available here http://sketchucation.com/pluginstore?pln=camera_export_import

Thank you TIG

@rich o brien said:

You can have tris but that shape is hard to resolve

Ok thanks Rich , I will try and sort it

That does look better Rich, as always with this sort of thing the client wants it to be triangular faces.