Hi six months late.... the soundtrack on my Duck You Sucker is 99% the mono track from the non-SE R2 DVD (forget the year). I included some extra dialogue from the 5.1 track as well at the end as it syncs with the Duck You Sucker title appearing and was Leone's intention. There is also an Italian Stereo track taken from the Italian CVC DVD included as well. The cue for the final flashback is the Italian version not the English 5.1 version I believe as well.