thank you TIG for your info. dean @tig said: Also remember that Sketchup/OpenGL doesn't like to make tiny faces <0.1mm or so, so FollowMe and similar tools can fail at these sizes. If you Scale up by 10 do the 'small faces' and Scale down by 0.1 it should make and remain OK afterwards - it's the 'making' not the 'existing' that's the bottom size limit.

wow thank you for both answers, ill try this