thanks for anyone who might download this because this is my first model because i suck at designing things 

you look at the z axiz if there are gaps then its under extruding scale up the extrusion multiplyer by a scale factor of 0.1 if there are bumps you might be printing to fast or over extruding try slowing the print down a bit from your normal speed if there are still bumps scale DOWN the extrusion multiplyer by a scale factor of one

Cheers!