The more I look at SPX the more this still looks like just a of (v) rather than the micro wave 1 start to c from a VERY shallow b.
(& more than micro B of expanded flat b)
So that can still leave a "surprise" test of 2740* region as "b"...
*Also since this a wave stretched a bit more... the 2725 region may be needed so that the c of (v) fits w/ more normal proportions.
**Actually if we get 2740 for close to the 61.8% retrace of a then that sets up for c=a right at the top TL of the LD into the July OpEx.