I asked this in another thread, but maybe this is a better place. I raced USRA in the late 60s early 70s, classes at The Nats were all Group 7 - Pro, Semi Pro, Amateur and Novice.
I returned to racing in the 90s, now the Nats was Group 7 pro, Semi Pro and Geezer. Also 27, International 15 and Box Stock,
Now "sort of" returning to racing, I still see Group 7 Pro, One or Two motor open, 27 lite, not sure what else. Group 7 looks poorly attended, one and 2 motor looks very popular.
I am looking for a history lesson, a time line when did things change? Also looking for opinions on why they changed. Even in the 90s it seemed like Group 7 was pricing itself out of existence.
Even if you were only around for a portion of my history gap I would love to hear of your observations.