Leader's customer service department is known for being pretty awesome. I don't think they'd pull your chain like that.

FYI - a batch of third generation (2007 I believe) 735tts were accidentally made using a seat tube with the wrong specs and Leader decided to offer them at a greatly reduced cost. Although it had more to do with the position of the rear-wheel cutout, it may have something to do with the clamp too. I know they've since improved the clamp mechanism. How much did he pay for it?