Funny you should ask! I have had an EZ loader roller trailer under my boat since new. (1987) Never had much of a problem with it, other than the usual wear and tear. However, a couple of weeks ago I happened to notice that on the rear crossmember on the front side (under the boat) which had not been easily visible, was a large patch of rust. After launching the boat where I could do a more thorough inspection I found that a large section of the cross member had rusted through and was in severe danger of failing!
I also made an observation at that time, (strange that I didn't notice it through all of the previous years) that the entire weight of the boat was resting on four ("4") bolts, where the crossmembers connected to the frame. These were also badly rusted! I immediately began to attempt obtaining replacement parts, only to be told by three different dealers that the parts for my model were no longer available!
It was now time to shop for a new trailer! After much investigation I have decided on a new aluminum bunk trailer. The bunk trailer will offer more support contact for my boat, along with more crossmembers and connections to support the weight of the boat. I checked with several different brands and manufacturers and found the prices to be almost identical with only a margin of up to $300.00 in difference. Looking back, if you can get more support for your boat the better, especially if you trailer a lot....
Tommy