Andrew,
Congratulations on your achievement.
To be able to build an echelle spectrograph and get it to work is not easy.
With a special interest in Spectroscopy I feel so privileged to be amongst such a talented bunch of like minded people.
Perhaps one day you will give a presentation to the BAA on how you accomplished such a worthwhile project.
I am especially interested in the technical side.
Regards,
Jack
Essex UK