but rather looking for a good exit point to lower my concentration from 82% net worth

Also a perfectly valid reason.

I think I remember you saying something awhile back that you lowered your holdings down to 65%, and more recently, 45%?

Yes, true, but not 45% of portfolio. 45% of the Berkshire share count I considered "baseline" for a long time. A lot of the reduction was actually a while ago, the 2021/2022 rally, not on the current rally. And of course a share is worth more than it was then, so the dollar allocation isn't down as much.

In any case, my numbers probably aren't suited to being a guide to anything, including my own views...my moves are often based on other things going on in my life. I'm particularly cash heavy at the moment more due to a real estate sale than any perception of market opportunities. The pricing level of market opportunities is merely what's preventing me from reducing the cash allocation : )
I really hoped for a nice BRK price crash this quarter. 1.3 times book would be nice. Is that so much to ask? It can be brief!

Jim