Just to mention it again. My 8ight with a 1512 1.5D/F and MM doesn't cog. It has the same KV as my Plettenberg Maximum around 3100 rpm/v. I ran the Maximum with a 125b and MM, both don't cog. I do like the Neu better. It really lays down the power. Here is a short vid jumping at my local track with the LOSI-NEU.
http://www.rcpics.net/media/Losi_8ight.wmv