I would not rely on a significant improvement of CAF with G9, if I were you :-(
I like this camera but unfortunately the Predictive AF , especially for smaller subjects and busy background is worse than EM1-2 (ox EM1x).
I spotted this guy at Croft recently. I have personally been looking for something similar and he got it on eBay. Probably the most useful accesory you can buy for motorsport, you can even sit on it. View attachment 781294
I bought it for the Daytona 24 hour race. It was a bit too short, I thought it'd be enough being 6'3". It was doable but not comfortable. The one posted above have been great, or even a small fold out 2 step ladder but those get pretty heavy.
It didnt last me the whole race though, lol. I stayed up for all 24 hours, and somehow managed to forget it way up at the top of the grandstands at like 3am. I walked miles away from it before I realized I forgot it, and didnt feel like going back for it.