A colt by Grand Slam whipped through a quarter mile in :21 1/5 to post the fastest work at the distance Saturday during the fourth and final session of the under tack show for the Ocala Breeders' Sales Company's spring sale of 2-year-olds in training. The dark bay or brown colt is out of stakes-placed Stephanie's Road (by Strawberry Road). He is consigned to the auction by M & H Training and Sales, agent.A Cobra King filly worked the session's fastest eighth, stopping the timer in :10 1/5. Out of Too Salty (by Salt Lake), the dark bay or brown filly is consigned by Kings Equine, agent.The final session's fastest three-eighths, :34, was turned in by a Confide filly. Consigned by Southern Chase Farm, agent, the bay filly is out Tiwa Wolf E F (by Wolf Power), a half-sister to stakes winner Exclusivengagement.The spring sale is scheduled to run from Mondaythrough Thursday, with sessions beginning each day at 10:30 a.m. (EDT).