'TDN Rising Star' and GII Risen Star S. hero Mandaloun (Into Mischief) and D J Stable's Helium (Ironicus), upset winner of the GII Tampa Bay Derby, each tuned up for their upcoming starts in the GI Kentucky Derby May 1 with Saturday morning drills over the Churchill Downs main track. Working in the company of his fellow graded-stakes winning Juddmonte colorbearer Bonny South (Munnings), Mandaloun went five furlongs in :58.80 in splits of :23.40 and :46.60 before galloping out three-quarters of a mile in 1:11.40 and seven-eighths in 1:25.60, according...