On the castle website or in one of their manuals (I forget which) it says the esc autodetects the optimum timing for the motor connected, and the adjustment in the castlelink adjusts the timing around that detected optimum - I dont think what your choosing are degree values wrt zero.
why not switch the traxxas connectors out for a few runs, see if that helps... simple and pretty easy, a 5 minute job. solder on some large bullets (5.5+) and see how that goes...
hyper 8.5 pro SOLD!
Monster Max Still Working...
JR SX3
Neu 1512 2D/S
12t pinion
4800 zippy-r