Changes in Trillium 4500 from 1977 to 1981

[John Groom]

Can anyone tell me about the changes Trillium made to their 4500 trailers from 1977 to 1981?

They seem to have increased in weight by quit a bit from what I have been seeing on the market.

Also, what to expect and watch out for in terms of axles in these models and years.

Thanks,

John Groom