Have you installed the new brake assemblies yet?
I have thought about installing them, if I need to change pads or they wear out or whatever. One thing that concerned me though was how low the specs are on the rv industries brake drums. The drum run out can vary from very little to more than the self adjusting brakes can handle. If the run out is to excessive the brakes adjust every time they hit the open spot and after a few thousand miles are very tight.
A quick google search found this which describes it.
https://www.rv.net/forum/index.cfm/fuseaction/thread/tid/23458294/print/true.cfm
No way I would spend all that time finding the perfect set of drums if I had their problem, I'd just yank the self adjusting mechanisms out. It's not that hard to just do the manual adjustment.
If the disc brakes were not so expensive and our trailers a lot heavier they would be a no brainer.