I haven't bent a Stihl Lite bar yet! I pretty much only cut burnt or rotten stuff at work so my conditions are unusually grim, and green wood is a luxury. So far they've held up way better than expected. I have had pretty good luck straightening regular ES bars that I've tweaked using a vise and my own body weight and patience but so far the Lite bars haven't taken a tweak I needed to address. I did bork the bearing in one nose when the tree sat down on it but once I swapped that out the bar was good as new.
trying to steer trees... and hanging out at the stump too long, smashed a 660 doing that(handle bars got munched, still a runner when I sold it) oh and had a saw fall out of the skidder, that then got runned over... (bent the bar, wrecked the clutch cover... and a tore a big gash in the sidewall of the skidder tire, that powerhead is now my back up saw, got 7 more years out of the tire too lol, finally started to come apart where it got gashed, as well as being bald)
To be fair I've been running them since they came out only about 3 were tweaked so bad I couldn't straighten them, one wore out the sprocket nose, but its still good, current main saw that bar has out lived 2 saws now... its is getting a little sloppy but still cuts straight so?