Speaking of Heinrich and wills - something I found interesting during my reading of Fritz' wills were the individual legacies, particularly the ones for Heinrich, because they reflect Fritz' attitude towards him. It's very obvious that he was on Fritz' shit list in 1752 (because they were arguing about Heinrich's planned marriage I guess, also possibly money?), and while everybody who was still alive got an upgrade in the second will, Heinrich once again stands out, but in the other direction this time:

1752:

13. I will bequeath four hand horses from my stable and accessories to my brother Heinrich.

for comparison, Ferdinand:

16. To my brother Ferdinand, who has always shown me friendship, 20,000 thalers, 100 buckets of Hungarian wine, six hand horses with their saddlecloths, a team of Prussian horses and the second set of my silver service in Potsdam.

Whereas in 1769, it's this:

9. To my brother Heinrich 200,000 thalers, 50 buckets of Hungarian wine, a beautiful rock crystal chandelier from Potsdam, the green diamond that I wear on my finger, two hand horses with accessories and a team of six Prussian horses.

13. To my dear brother Ferdinand, 50,000 thalers, 50 buckets of Hungarian wine, a gala carriage with a team of horses and all accessories.