synchi)ng carbs

I realize this is a GZ forum and that bike has only one cylinder, but since there has been some discussion of other bikes lately, including v twins, I thought I'd throw this out there to you experienced riders.

On other forums I've seen directions on how to make a simple carb synching tool (a manometer?). Supposedly an easy tool to make and an easy process to do. Has anyone out there actually synched carbs before and does it help the bike run smoother, especially the v twins?

Thanks,

Keith