So I've had a Squier Affinity P-bass for a while and I didn't know what to really do with it. It sounded great with flats on it, but lacked the B-string that I needed. I had wanted to string it BEAD for a while but was too cheap/lazy to buy nut files. So today I took some 5-string rounds I had and used the string to file down the nut. It took about 10 seconds per nut and the new strings fit perfectly. Got Ernie Ball Power Slinkys, .135 B-string. Did a full setup and it plays great! It was less work that I thought it would be. It's a little weird without the G-string, but somehow my brain knows exactly where to play up the neck to make up for it. No buzzing strings, intonation is excellent. String volume is even on all four strings. I have no regrets!