I'm looking for an APX 100 substitute since the new APX seems to be something entirely different (Kentmere?). Silvermax is supposed to be very similar which is fine. But I'm guessing there must be SOME difference between the two. Can anyone say what this is? Would results from Silvermax, to all intents and purposes, be the same as APX 100 or different in some way? If Silvermax wouldn't be a good substitute, what then am I looking at? What about Fomapan 100? Any help would be greatly appreciated as I've run out of film and will be placing an order soon.