Hydraulic Clamp/Thumb - Bobcat 325

I’d been having some difficulty getting a new aftermarket thumb to work on my 1998 Bobcat 325 mini-ex. However, I finally have the whole thing working perfectly!

Along the way, I purchased the Operation and Maintenance Manual. On Page 83, there is one small note in the manual that says that the use of the thumb “Requires” the use of port relief valves in the auxiliary valve circuit, but the whole thing is working perfectly. So, could anyone help? Am I going to damage something by using...

Hydraulic Clamp/Thumb - Bobcat 325

Hydraulic Clamp/Thumb - Bobcat 325