You know u are spot on with the on off feel of the 086. That has been exactly what I have been thinking with my p5. I am running the 086. It like a on off switch. I have been kicking around wanting to put my 2058 on it to see if it will smooth it out some. It is ether off or screaming. Lol! but she will keep up and chew up just about anything on the track. and when I run it I so can tell the deference from my p5 to the rest of the engines running n the track also! It's pretty cool.lol!