Wondering if High PS pump pressure is the cause of a “loose” on center feel with the Borgeson steering box. I checked all the steering components for play and didn’t find any. The steering pump is a reman’d unit from a 2000 Dodge pick up
The amount of boost might have a little bit to do with how the on center spot feels, but the on center spot itself is just a product of a worm and ball steering gear. The power steering boost doesn't change the ratio of the gear, just lessens the amount of effort needed to turn the wheel, so really other than feel it shouldn't affect the size of the spot.
The size of the on center spot can increase with wear on the box, but because of how that design works you can't ever really get rid of it. I assume the Borgeson does have a way to tighten the lash in the gear, have you tried that?