Is that the same slide dup stock you gave me many years ago? That stuff is bruuuuutiful 
No, that stock is gone, but I have 2 more 100' rolls I bought fairly cheap on auction. This one expired just recently (1996). I think the one I shared with you had expired in 1981. But I agree that this film is beautiful as either C41 or ECN2 ( I have never developed a single roll as E6). This day was a little gloomy, so the colorful wings didn't pop as much as I would have liked. Also, my Windows10 partition decided to corrupt itself, so I am scanning with Linux now and the tools aren't quite as easy to use.