Digital BW, The Print

Paul, et al;
My 1400 is set up and I have a couple of questions.
1. The table which supports the print is not completely still; ie, when printing, the printer has a slight rock to it. 
Is it critical that the printer not move or the support not move?

2. As suggested, I loaded the orig. color cartridges emsuring that the printer did and would work properly. I want to replace the ink with the MIS 1400 and get on with my B&W print life. 
IS it essential that I wash out the color inks before installing?
Thanks in advance for any input.
Craig Blackman

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