I've caught Bass up to around 6lbs on 4lb test mono on UL equipment. The trick is to not depend on the drag system, but play the fish using the "back wind" method. I leave the anti-reverse on until I realize I have a large fish on, then turn it off & wind forward or backward according to how the fish gives & takes line. I keep just enough rod bend pressure on the fish, as is needed to keep the fish under control and not allow any slack to get in the line. I also use my arms as extensions to the short UL rod, so as to make it "longer" ... giving me more shock absorption, and to keep the fish from bending it beyond its capacity.
... cp