Timing Belt Coupler

This is a transform from http://www.thingiverse.com/thing:29640
This original design is connect belt to become a loop. My edition can join long belt and no need to cut.
如果你害怕剪短皮帶，你可以這樣子把皮帶對接固定。

The disadvantage is it will not be horizontal. Or you can use two of it to make straighter.
缺點是，拉緊皮帶時可能會翹起，那麼，就用兩個吧