I have a RB kit I bought new in 1967. Lately I've been buying parts and additional drums to add to it. I now have drums from the 70s and 80s. I have noticed that the 80s (square badge) drums have rounded bearing edges. They still sound terrific. One is an 18X18 that sounds incredible. When did Gretsch change from the 30 degree edges?

Anyone have a RB kit and a new custom USA kit? Any difference in sound?

Dave