Who (what brand) makes the heaviest gauge 4 string (nickel plated) available? I'm looking to tune down one of my Basses to B E A D and I really don't want to buy a 5 string set (I used to do that back in the day when I played Metal); I just want to find the heaviest gauge 4 string set available; and Yes, I already have a 5 string, I'm just more comfortable playing a 4 right now and I don't wanna keep re-tuning any one Bass. I'm thinking a set with a 110 E string would be great.