Hello there 
,
A new SketchUp extension has been released! 
Need to create edges extended guides?
Does finding cross points of edges take too long?
Do you find it frustrating to deal with infinite construction lines that clutter your workspace?
If you’re looking for a smarter, more efficient way to work in SketchUp, then you need Extend and Cross extension.
Watch this short Youtube video
Check it here:
SketchUp Extension for 3d design