These are the the setting that I downloaded from a new unconfigured Sainsmart PROVer GRBL control board.

$0=10
$1=25
$2=0
$3=2
$4=0
$5=0
$6=0
$10=3
$11=0.010
$12=0.002
$13=0
$20=0
$21=1
$22=1
$23=3
$24=25.000
$25=500.000
$26=250
$27=1.000
$30=10000
$31=0
$32=0
$100=800.000
$101=800.000
$102=800.000
$110=2000.000
$111=2000.000
$112=600.000
$120=10.000
$121=10.000
$122=10.000
$130=500.000
$131=400.000
$132=100.000