Just a little more info on the Magnum chassis.
I HAVE 2003 Safari Sahara Motor home that was built on a Magnum chassis.
I took it in for the trail arms recall

I was pleasantly surprised when Creative Coach in Florida informed me that the trail arms on this Magnum chassis looked well made and did not have to be replaced as I was initially led to believe.
He said they were much stronger than the ones that needed to be replaced. I thanked him for saving me about 3,000 dollars.

It appears that when my coach was built they were still using Safari technology.