Weak lamination in middle of x axis parts

So due to the OpenSCAD bug I had to slice the x-ends in Cura 13.11 .. I calibrated appropriately and printed. The nut trap in the for the brass nut came out great .. but several layers in the middle were separated and with a some force the pieces broke in half.

I know this should go in print problems, but think someone here will give me a more expedient answer since it is a Mendel90 part. Please see attached pic.

Increase flow %? Temp?

Printing with natural ABS. .3mm layers. 30% infill.

Probably the temperature is too low for good bonding. I use 250C for ABS although it is is different type to that you are using as it is naturally white not cream.

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