Strength between layers (1 reply)

I built a prusa mendal and am fairly happy with the print quality I am getting (could be better but getting there). Even so...

Is there anything I can do to improve the strength of the bond between layers. I have designed to take advantage of the strength of the XY plan, but sometimes, I need a bit more strength in Z as well. Is there anything I should be considering to improve the strength across the Z plain? Smaller extruder nozzle?

I am using .5 nozzle and 3 mm ABS.