I've been having a tough time with grbl in general. I started with the Arduino Due and a gShield to run g2core (based on grbl), but I could never get it to connect to three different computers running three different operating systems. I replaced the Due with an Uno and it connected immediately...on one machine. Still having trouble (but different trouble) on others. People talked me into going the grbl/Arduino route when I didn't want to deal with it, but now that I'm having trouble they are nowhere to be found.
Anyway, I just wanted to comment to let you know that I understand the kind of frustration you're dealing with (people not responding when you are looking for help), and I hope that a comment will help encourage more activity on your post.