Hi Chipp, also if you look closely at the top surface you can see that it has a bit of an undulating wave to it:



That kind of undulation is the type of artifact that often results from fitting one single curve that runs through a curvature discontinuity like you'll get at a juncture between a line and and arc. If that was the result of using the Rebuild command you could try using a tighter tolerance value like 0.001 units instead of only 0.01 units, which would reduce the undulations. But keeping it as separate arc and line pieces would give the most accuracy and keep the top to be a simple plane... It would also introduce more edges which makes for a more complex topology too though which may cause other problems later on at junctures where you've got a whole lot of edges coming out from one single vertex.

- Michael