The Joint Pull Push Tool is what i used for this sort of actvitiy. Have you tried it?
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@olishea said:
lol Tobobo:
He was thinking that the floor was opening for a wall of death or circle pit.
@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. 
