Quote Originally Posted by fred_dot_u View Post
At first glance, that looks like overextrusion, but your comment about unused filament makes me wonder if you have moisture in your filament.

If you have a food dehydrator, run the spool in that for a day or so and make another test print. If you don't, you can heat it in a low heat oven, but there are many photos of people who don't manage the temperatures well and melt the entire spool!
Any layer smaller than this is ok. In fact by the time i got to the top layer of this (4th layer) it looked perfect. If it was an over-extrusion problem I would assume it would always occur no?

Thanks
Dave