Geeetech i3 pro C dual extruder X belt holder

On the foto you see the original holder (blue) that worked only a view days. Then it opend and didnt´t fix the belt anymore.
So I build an new onte that ist stronger and used PETG for this print.
The white one works fine now.
I printed it slow at 40 % and fillrate 65 %, Nozzel 240 degree C and bed 140 degree C