Boy, with all our R3000 customers I thought you would get tons of helpful feedback from other users...
I haven't used our R3000 for a few weeks (it's in safe storage mode with PiezoFlush in the lines), so will have to fire it up and refresh my memory in order to answer your questions.
It's great that you are evaluating the printer to make sure it's in good/normal working condition before switching inks. I believe it's always best to have a solid base before moving forward in order to minimize the factors and achieve the best end results (this applies to everything in life).
I'll be back with information ASAP.
All the best~ Dana