Hi,
No problem at all. I do this constantly between Paul’s EB6 and Epson 9890 left-overs and all I do, as Paul mentions, is to clean them with base, the same used to make EB6 per Paul’s formula. I used to do it with a syringe and a small piece of tubing one channel at a time and I now do it with an extra set of carts with base. It’s less of a hassle when done frequently! Haven’t had any problems and in fact it’s one more of the many charms of the 1430.
Hope this helps!
Best,
Pablo