Do we know how the Master found Eli? I heard how he found Lee for FAFDM, but my GBU dvd has no extras...How can be somebody SO COOL?
Actually, Leone chose Wallach mainly from his role as Charlie Gant in How the West was Won (like his comedic ability, teased young soon-to-be Chip Douglas there), not from his role as Calvera in Magnificent Seven. My guess would be "both".
Calvera is one of the best things in TMS. I heard Kurosawa liked the remake But Eli is better when he's not a villain, just... ugly.