Why are my corners raising up?

[dustmann]

Ok so I finally fixed this issue. I was able to print the perimeter width model perfectly and slid the components into each other (very tight fit). My cubes are now within a couple of hundredths (i.e. my 10mm cubes are ~9.97-10.02mm) on all sides.

Slicer 1.2.9. seems to over-extrude compared to 1.1.7. My "good" settings ended up being .2mm layer height, .2mm first layer, .5mm default extr width, disabled perimeter overlap, extrusion multi @ .90, 100% 1st layer, 100% top infill, 100% perimeters, 100% external perimeters, .2mm z offset at 205/65C temps