My notes  on when I used it for quilting with my 12000:
Blue bobbin case
50 wt cotton in bobbin
100# Microquilter poly (Superior's) on top
HL stitch #1
SL 2.7
TT 9.6 
FP auto
80/20 batting
There's no mention of a particular needle, so I assume I must have used my usual for quilting: Schmetz Quilting #14
Hope it helps,
Jan