Hi,
I know I'm not going to be regularly racing in your region but did hope to do a few as a "guest" to try out some of the tracks.
20mins practice seems a very short amount to get everybody through, even if you limit everyone to 5mins and only allow 1min for change over it still means you can only get 3 heats worth of cars (30 or so) through.
I'm just interested in how practice works in your region