Arnie, did you start with the PAL DVDs? If so, the jaggies are partly (if not entirely) due to the PAL DVDs being a simple upscale of the NTSC ones.
The jaggies do seem to be horizontal only, so perhaps you only need to EEDI2 once, and not turnleft/turnright. There's also a plugin from the same author called something like EEDIupsizer, which scales up by 2 in both directions in one go.