Eneroth Auto Weld is the newest sketchup plugin that supports SketchUp 2016, SketchUp 2017, SketchUp 2018.
This plugin can be used to weld the opted edges collectively as well as look for edges to be welded and weld them at the same time. The search is restricted to the selection if there exist one, or else all edges in the existing drawing context are verified.
The plugin also automatically searches edges to weld when Follow Me Tool has been used. It means you don’t need to handle with all the exploded curves whenever you apply the tool.
Finally, the plugin creates perfect arcs and circles whenever probable, not like generic curves, which among other things facilitate you to view the radius in Entity Info.
Run the plugin from Extensions > Eneroth Auto Weld > Weld or Toolbar. Settings are available under Extensions Eneroth Auto Weld > Settings.
The extension can be downloaded from extension warehouse extensions.sketchup.com
Watch the following video for online demonstration.