Hi- Are the knuckles under hydragas spheres supposed to be tight like a ball joint? I’m replacing the hydragas spheres with re-gassed units from HAHSLTD.co.uk. Took out the old spheres and was surprised at how floppy the knuckles were. If they were ball joints, I’d assume they were bad, but since these are in compression perhaps it doesn’t matter as much? They also have plastic parts inside which makes me think they aren’t supposed to be tight. A new set is very expensive.