I found this a while ago, it is a visit to the Schultz & Larsen factory at Rask Mølle. The quality of the video is not good and it narrated in Danish however it does give a good overview of the existing factory and includes footage of a young Morten Krogh and Jorgen Nielsen. Look out for the barrel rifling machines and the vertical lapping machine. This was either filmed in the early days of the new plant or they had a major tidy up on the day! Possibly a combination of both.
Regardless of language it is well worth watching.