Hey guys i want to move my stepper motors (3Nm NEMA23 Motors) so they will not stick out so much
like here on the Z axis:

Click image for larger version. 

Name:	FAQOMF0HMVJDE8G.jpg 
Views:	145 
Size:	279.5 KB 
ID:	30249

so i opened aliexpress and the amount of options of pullies and timing belts was overwhelming
how do you choose the timing belt and the pully?

Thanks!