This just popped into my head when I was playing Phantom just now. When the Maidens started, did you conciously choose to play Dave's parts or did it just seem to happen. When I first started learning Maiden songs, I just picked a riff to learn not thinking about who played it and as I learnt more it turned out that I was always learning Dave's parts. So now when I'm learning new ones, I choose to learn Dave's part since I know his for a few other songs.