Power Steering issue
 

Guys: I posted this on the general section too, but wanted to be sure all PQ owners saw it.
I have the dual Imco hydraulic steering set up and it gets very hard to steer at idle speeds. The most common "solution" I have found from my research is the suggestion to drill the orifice out in the pump. We did that, but it did not help. Has anyone tried one of the Hardin pumps? They claim to fix this problem. Any other ideas?

Guys: Any input at all? I know there are some mechanical guru's around! All I am getting from other sources is that I must not have full hydraulic. Not true. Anyone install a crossover system to connect the two pumps? I see Merc makes that kit and actually mentions it is recommended for my type of a system. They are very pricey though!