Ok, I haven't seen this issue addressed, so I will add my ¢.02.
I stopped using oar rites a while back. One of the biggest benefits I that have seen from not using them, is that I hardly ever end up with callous on my palms anymore. Seeing as how I usually had to go through at least one, if not more than one, set of blisters before a decent callous would set in, I consider the current situation a big win.
The problem that I found I had with the oar rites was that without the shaft being able to turn, and give some way, the next weakest link in the chain was my wet palm skin. That would inevitably lead to the skin subcutaneously tearing and a callous forming... eventually.
After I started to use oar stops regularly , and got used to what I could do with them control wise, I stopped using my oar rites all together.
Just my opinion....
Plus someone owes me ¢.02 for using the word subcutaneously in it's proper context........