Hello, Lee
Good work, at 18.67 Eris is indeed faint. As fate would have it, as I read your post I am just some 5 mins into acquiring a 10 minute sub-frame under the muggy, light polluted skies of Brisbane.
Hopefully by the end of tonight I will have been able to dig this one out of the background muck. Nice little galaxy by the way!
Cheers
Dennis