QTR-Quadtone RIP

I know that QTR maxes out at 2880 dpi.

The R3000 does not have that option (which disgruntles me!), so what am I setting here?  The printer has:
1440x720, 1440x1440 and 5760x1440.

Also, which "1440" am I using at 1440?

Another failing of the Epson front end is the lack of ability to fully control print quality.  Once a paper type is chosen it locks you into a few options.

Are you overriding the driver somehow?

Seth