I have a lot of these. They are my gamers hands down. My NR has well over 1000 swings on it. No rattles, webbing, cracks etc... I have been swinging the one with the return in 40 degree with 47/525 balls. probably has 7-800 swings on it. and not a scratch. These things are awesome. get about 600 swings and it changes gear. It changed sounds around 1000 swings and now the ball just jumps.
the sonic in the video is the one with the return. 7-800 swings. in the 2nd video skip to about 1 minute mark
[ame]http://youtu.be/03MHjBecbbo[/ame].
[ame]http://youtu.be/4vuglQ_5jBk?t=1m[/ame]