THERE was an in-house rivalry at the top of the EI 100, which eventually saw Shannon Nelson steal a winning advantage over her partner Cathal Daniels. Teaming up for the first time with the former Heidi Woodhead-ridden DHI Cadeau (by NC Amiro), Nelson completed on her winning dressage mark of 27.5, just in front of Daniels and the first-timer Myzamba (28.3). As scores clustered tightly, and the majority delivered double clear rounds, Daniel Alderson filled third with fellow debutante Ballyglan OBOS.