I was particularly interested in the OIII-rich projection coming from the upper side of the nebula.  Below is an image taken with a slightly larger telescope, the 8.2 m Subaru telescope, showing this same feature. Thanks to Greg Morgan for pointing out this reference. Image credit - Toru Yamada/NAOJ

Astrodon 3 nm H-a, OIII and SII mapped to green, blue and red, respectively (Hubble palette).
CCD AutoPilot4 for data acquistion using MaximDL
Processed in CCDStack and Photoshop CS3
Image cropped to ~ 15 arcmin square (from 35 arcmin)