I received optical bench test report of Swarovski ATX 95 spotting scope objective module.
Here is some pictures.
Ronchi and Foucault:
A few comments from the tester. Probably some people know who the tester is
The whole unit "asis" is a high quality optical device. Removing a prism unit introduces the CA, but for your ~40X deep sky it should work fine.
The objective alone has chromatic aberration. It looks like it was designed as a complete unit including prisms.Adding 40mm of glass reduces the CA.