Now my flexure problems have been reduced I hope to use the Astrodon Continuum filter to remove stars from mosaics of faint SNRs.
The first two pictures below show about a quarter of RCW114 with and without stars. I used StarTools to remove the stars.
Here is a large image of the Vela SNR in NII and OIII done the same way. 9MB
http://d1355990.i49.quadrahosting.co...R_NII_OIII.jpg
As you can see the really faint stuff is far clearer without the star clutter. It will also be easier to add to RGB data.
Bert