Thanks guys. I've installed SpenceKonde/ATTinyCore and given it a try. All seems well.
Spence's core has a lot more interesting options in the board menu that the damellis one. If DrAzzy is listenting, it would be useful to know which control the build and which are AVRDude fuse options. I am burning my firmware using a TL-866 and have to do all the fuses myself. So knowing what board options are shorthand for AVRDude fuse settings, versus which are build options would help. I will have to go through the board definition tables to familiarize myself.