In 2018 I inquired about IS on our small fifth wheel. MORRyde service said they didn't recommend IS on less than 7K axles and suggested the SRE4000 rubberized equalizer. We had riser tubes, the SRE4000, and an X-Factor brace installed. It worked so well with the MORRyde rubber pin box that I had previously installed that chucking was all but gone. We noticed that the microwave plate started staying in place. In conversation at that time, they mentioned that they had to lay off half of their staff during the 2008 Great Recession. Perhaps they are now concerned about increasing the size of their service department so that they don't get caught having to layoff again.
In late winter 2019 we ordered a trailer that came with totally inadequate axles (5100 on a trailer that weighed 10750 empty with a 12000 GVWR.) Knowing that the situation would be inadequate I called MORRyde to inquire about improvements thinking I would beat the summer rush. They were backed up 3 months (and they don't do axle work other than IS.) I found an axle shop and had them install Kodiak disk brakes, an SRE4000, 6000 lb axles, and 3 X-Factor braces. I ended up rebuilding my MORRyde pin box myself because I didn't want to wait 3 months. Results are great.