HI there,
So , if the lead time is too long , You know with the openness of the Info for the board. You could have them made probably faster. HOW?
Download the from the WIKI the files
Open them in EASYEDA (modify if you want but don’t if as is)
Drop it into the make PCB and follow the prompts…
takes about 20 minutes to walk through it. Check the parts stock levels.
have them build it and ship it , takes about 5 days.
I have done it more than 5 times with other grove PCB’s and even combined the EMG board to a 3 channel version.
HTH
GL 
PJ 
from this
to this…
The Expansion Board it great!, I’ve added the extra Flash chip to the bottom, check out the Demo on here.
