So I strung two racquets last weekend and I hadn't strung a racquet in about 3 years (strung about 3 racquets with my crank stringing machine, thats about it). So I really had to completely relearn how to string racquets and how to use my stringing machine without the user manual which disappeared on me. Using Yulitle's youtube videos I was able to string my racquets semi-successfully. I had a lot of trouble with the fixed clamps because I forgot to lock them sometimes and I didn't realize that was so important to hold tension, LOL. Ended up trashing 20 ft of my wilson enduro tour (3 year old string). At one point the ball bearing slot that holds the string for tension wasnt big enough to hold the string. I didn't realize that you just need to push it down... i ended up toying with the screw with the spring on it next to it. No idea what that does could someone tell me? I hope it didnt screw up the tension. Which gets me to the point of this whole post. My strings broke yesterday after about 4 hours of total playtime. Wilson Enduro Tour 17 gauge, like I said, strings that had been sitting for 3 years -- they're poly so I didn't expect them to break that fast at all? I mean i put some mean topspin on the ball and I did hit with a 5.0 but four hours? really? Strung them at 62-63 pounds and I figure because it's a crank it'll lose 10% of the tension as well so I factored that in. I noticed the strings had pretty big notches on it after it broke. Broke kind of close to the middle of the racquet. I'm a perfectionist and I spent all day stringing one racquet and followed a lot of Yulite's techniques. My stringing machine hasn't been calibrated... could that be it? I don't think I really have access to anything to calibrate it with and im pretty broke right now. What are some things that a bad string job could do to cause the strings to break early? I plan on going to a tennis shop tommorow and getting some luxilon big banger alu power, I know its expensive and im broke but I hear it lasts for a while which is something I need until I get a job(plus I've really just wanted to try it for a while, haha). I've had strings that will last me a month that are a hybrid and the crosses break first. Not sure what they are as usually my mom, who plays tennis as well, goes out and gets them strung -- so if you think big banger is a bad choice for me as far as durability let me know an alternative.