Cracks on top bolts on [a]tap_center_r6

[SinisterRj]

Trying to debug some ressonance issues on my printer I was checking the overal boolts torques and accidentaly break this piece. But looking at it, I felt that this part is verry week at this point, with only 3 walls from here the bolts make contact to the end of the part. I was able to increase this number to 5 without reducing the clearences to the other parts. And in my modification I was abble to cincundate the entire rail carrige, also increasing the stiffness of the part a little bit. The new part is printed and it is working on my printer.