My only request is that there be a graphical representation of what is happening. Showing a (rough) Gaussian ray trace through the system that shows more-or-less where the CBP is hitting the primary mirror and approximately what the user should expect on the detector would be useful so users can better picture what the setup looks (or looked) like.
If we don't make the tool people will be forever looking for napkins to draw on. In fact, I'd be surprised if you can get the transformations right without a tool to guide you..
Could we maybe add in the discussion that a graphical representation of the solution is expected?