If the Rock Hound has a hyd driven motor with a lot of centrifugal force, then you need a motor spool valve, whether it is a lever or solenoid valve.
A motor spool valve should not be used with a cyl circuit.
So in essence, you really need two valves.
One type valve that will lock a cyl in neutral, and another valve that will let the hyd motor wind down as it is acting like a pump when you release the valve.
You could get by with a two spool valve with one spool a cyl spool and the other spool a motor spool.
It also has to do with the money you want to spend.
The basic 3rd function kit is about $400 and a two valve 3rd kit might go from $500 to 800.
Can you do all the work yourself?
To install a 3rd kit, you simply interrupt the PB from the FEL valve at the hyd blk and add the 3rd kit in series with the flow path.
Your manual will show you the ports on the hyd blk.