It seems to me that it would be in the string manufacturers' best interest to make sets of bass strings designed for playing in drop D or drop C tuning. There are plenty of guitar strings that are set up for that kind of a tuning (Ernie Ball Skinny Top-Heavy Bottoms, for example) so it would only make sense to make a few sets of strings that would work for us bassists the same way. All they would really need to do is take a medium or medium-heavy-guage set and bump the lowest string up by .010" or .020". I know, I know, we can always buy a five-string set, or just purchase a separate .115 or .120 guage string, but wouldn't it just be so much easier if we could just buy a pack of strings that WORKED? Come on, string makers! Start making packs of strings in guages like .050, .070, .090, .120!!!