What is the new cylinder for?
What do you use the diverter for (I assume the independent MMM lift)?
You can add a new valve that would allow you to operate the MMM and the "new cylinder" one at a time, or even even a 2-spool valve that would let you keep them both hooked up at the same time. If it's for a grapple there is an even easier way...please tell me what your goal is