... I have been told that some can be adjusted??
As far as I have seen, only the Flexiride can be adjusted, by removing the arm from its splined connection to the rubber cartridge and replacing it at a different angular position. The rest are welded assemblies which cannot be adjusted. I suggest checking out the Axles & Running Gear
section of the [b]Helpful-Links feature under Resources on the left side of the FiberglassRV page to see what you have, but it is really unlikely to be Flexiride.
I agree with Roger: it looks like new axle time, which seems reasonable to me at this age of trailer.