Can I just say you clearly haven't been doing much research despite your claims that you have.? Why because if you had been looking carefully you wouldn't have made so many errors regards mounting things and the COCKUP with ballscrew running thru those supports shows this clearly.!

Your just wasting time at the moment because your not looking at the details and it's the details that matter most. Anybody can fudge together an outline of a CNC machine but building one requires certain Details are 100% correct and your not seeing them because you haven't looked/read closely enough at other builds. Asking questions is good an I encourage it but asking questions that are clearly in other threads that you have been advised to read is just lazy or you haven't done what you said you had.!!

I'll give you this one last bit of info which you should have seen from other builds then I'm not giving anymore I see which should have been obvious in other threads pointed out to you.!!

15mm wide timing belts, HTD series 5mm pitch no less than 18T pulleys because there isn't enough material left on boss for decent Grub screws after boring, plus better tooth engagement. I use 20T all the time when 1:1 ratio and 18/36 when 2:1

Now go back to reading other threads and start paying attention to the details.!!