360 LA installing Promaxx Aluminum heads

I like to give both measurements as I don’t really trust cup size measurements. I have a cheap set of depth gauges but the old school way was to use a ball bearing on known size. This would probably be nice for some of you guys to have in your engine build tool box.
https://www.amazon.com/dp/B0063LMXJ6/?tag=fabo03-20