Did you see how quickly I reverted to shoulder use on sumi otoshi? (I know you did!) lol
The important thing is that *you* can see it, Ron. Because I'm not going to be there. The worry is about guys who use their shoulders but who are convinced they don't!
And hey.... I have to monitor myself constantly, too. My general rule of thumb is: "I'm sure I'm doing something wrong... what is it this time?"