I've been sort of inactive for awhile but R4 brought me back! really excited for the 78g!
No Idea For What ground zeal calls his  78g ??  as  78g. 
-  Any proper measurement?  If any, Show us please ! 
-  What's Your Reference?  Is it really 78g ? 
-  More than 30% of your R3 switches still have problems with squeaking noise, unstable bottoming with unpleasant noise and wobbling feelings never experienced before with other switches, what's the cause?  Still have QC issues? 
-  Does Anyone have similar issues? 
As one of your Gateron customers, and as a MX Springs Designer, I have to ask the Basic Questions for the People, Nothing personal at all.  As a Chinese saying, 'Bitter advice can be a good medicine'   Thanks!