no worries Bob, really nice result.
you'll find that processing is sooo much easier if you take some flats and apply them through DSS (and you won't lose as much of the faint neb through processing).
they are fairly easy to capture with a dslr, i think on the nikons you select A and pretty much a mid range iso. good to do twilight flats on a large aperture like the 10" - have a look at
http://www.iceinspace.com.au/63-211-0-0-1-0.html
cheers