I'm very fond of the 401g and that one looks like a nice example. Do you have the case as well as the cabinet?
This just idle curiosity on my part, as i) I already have one and ii) Thetford is a long, long way away!
Recently I've been using mine for sewing my skirt lining, threaded in a different colour to that for the main fabric. The straight stitch foot and plate are great for handling slippy fabrics or long seams.