I dont want to Hi-Jack your thread, but in answer to Bill's question the Super 7 has 60 teeth on the bull wheel making it very useful for direct indexing.
I had always wanted a filing rest for mine and recently obtained the Rolls Royce of filing rests.
In order to make use of this I needed to be able to index and hold the spindle in a fixed position, so after a bit of work with CAD (Cardboard Aided Design)
I came up with this design which lives permanently on the lathe and still allows the belt guard to close properly.
Disengaged.
Engaged.
Phil