awesome to see that @neil, thanks for sharing!! Fusion is a good tool especially as it can be embedded in Tulip Apps.
if you would like to continue using CATIA however, have you considered using the CAD viewer?? while it cannot contain dimensions and callouts, it may be a worthwhile solution to investigate: [Tip of the Week] Adding a CAD File to your App. for drawings, we do indeed recommend embedding PDF’s.
let me know your thoughts!!