Very likely soleman - if he can't get the speed limit right for the area he was doing the speed enforcement, who knows what else he didn't get right; the margin for error is much less at 35 mph - you'd be within 13.4 mph (don't admit speeding; leeway doesn't apply if one actually admits speeding) ... if his reflexes were a bit off (pressing the start/stop button on the VASCAR unit a bit late/early respectively) and/or the reference marks used are closer together than 126.72 feet (0.024 mile).

Be darn sure though that the speed limit sign you're referring to is the one that applies - look on the ticket - he mentions Woodvale Street as where the incident took place - check the entire length of that street which you had driven the other day to be sure there are no 25 MPH signs along the way; you say he'd been following you for awhile before making the stop.

Ron