I intend to try a few things. I'm curious to compare with my f11ed on moon and planets for kicks. Achro or not, there was a ton of detail in the eyepiece.
For me, that's part of the fun with the equipment side of this hobby. It lends itself to easy experimentation and comparisons. The only concern with using stops is that, with my experience testing dozens of lenses in DPAC, many, if not the majority, have subtle, circular zones right smack in the middle. However, this is were they do, by far, the least damage to the wave front, but at reduced aperture, they will cover a larger portion of that aperture than they did before. But, it's soooo easy to try an aperture stop and check things out.
As many have said, and it's been my experience too, the moon is a solar system object special case where even "lowly" achromats can excel, providing very sharp views despite the "CA", as it has such a very large range of contrasts associated with its surface due to the abrupt shifts from the brightness of the sunlit surface and the abrupt blackness of the shadows. I think you may have already witnessed a bit of that. Saturn will also reveal itself rather well too. I find that planet's rather yellowish, boiled egg yolk, appearance lends itself to the yellowish tint that an achromat displays at high power. Jupiter is the toughest target for me with an achromat as it displays very subtle color contrasts over its surface. However, I bet you will be surprised despite that when Jove rolls around. Mars can also fair well as I'm convinced the design of these particular vintage achromats bring the red focus closer to the green/yellow, letting blue bloom a bit. It will serve Mars better than you might expect as well.
So, IMO, you have a bit more than a one trick pony (great low power, coma free views). Rather it can do other tricks quite well but with certain limitations and a bit of training and experimentation by the rider.