This was the first night of the year where seeing was somewhat stable, so I hauled the 180mm Mak out into the yard for some lunar viewing. All views were with a Takahashi prism. At first the seeing held for the 16mm (169), then I tried my BST 58° 9mm (300), but that looked like too much power. After 20 minutes, the seeing appeared to stabilize, and that's when things got fun.
The BCO 10mm (270) always puts up lovely views if the seeing is anything near stable. Then I tried the Tak ortho 9mm, and it looked like it held.
I looked at several locations: The trio of Catharina, Cyrillus, and Theophilus began to offer a wealth of detail in the rough terrain. The seeing increasingly allowed this. The 1950s, 8mm (338) Brandon, while sharp, lacked the contrast of the Takahashi. I also explored the area from Aristotle (only the rim caught the sun) to the Lacus Mortis and the Burg complex of craters and rills, out past Hercules and Atlas. I tried the BST 58° 9mm again, and compared it with my BST Flat Field 27mm and 3x Barlow. Both were good. The 58° was better, with more neutral color. At this point I tried a 7mm BST 58° and found the atmosphere holding still. Catharina, Cyrillus, and Theophilus filled the field. The rubble fields were impressive. Again, contrast was superior to the Brandon 8mm.
Conclusion: Time and again, I cannot find anything that outperforms the BST 58° eyepiece series from 9mm on down. The Brandon gets retired (again), and a new 58° series 8mm is on the way. I needed something to fill the gaping hole between 9 and 7mm.