I will upload my setup from this past weekend at NYGP (grey TrackGT carpet) very soon.
I didn't change much, only made front damper and spring a bit softer to my normal basic setup to get more front roll.
Raced against Brent and Hanulec this past weekend. I keept using my 300k front diff, but i really think that Brent's car had better rip out of the corner by using a spool.
Anyway i think this is only suitable for 25.5-21.5T motors. With 17,5T motor this will be to much with a spool.
But maybe something interessting to test for you all :-)