I have not tried playing with the pressure. I saw Ricks creation , but I doubt Borgeson will do anything. Frankly I don't think this box will be around forever due to the price. Few really appreciate what this is in my opinion. The only reason for the plunge coupler Rick made was for E bodies. And even at that, one of these cars is usually modified to be much stiffer than oe with additional bracing, etc. In that case the plunge coupler may not be necessary. All the rest have collapsible shafts to take up any play. I cut my steering shaft for the install. I would not even consider going back to a stock box.