Hi ricekwan,
For A700-EvoIIC you can ask via the Support Email from Awesomatix, or your local distributor.
ST13 and ST14 is discontinued/replaced with IFJ and IRJ at Awesomatix.
But ST13 and ST14 can be still available at some Distributors.
A700-AT03M is suitable for the use of IFJ.
A700-GD2 is suitable for the use of IRJ.
What are the advantage of Ball Diffs for A700 over the Gear Diff in your Opinion ? And in which Class do you run with the BD1 Ball Diff ?
Regards, Max