Andy W. as a fellow marxist can I just say I adore your photo. If you ever sculpt and produce Marx Brothers miniatures please understand I will buy bucket loads.
Could I possibly suggest (IF you are keen on ideas) that you sculpt 2-3 sitting senate bodies, with neck sockets and 3-4 heads, it means you could fill a senate with essentially the same set of figures but mishmash heads & positions. I love your sculpt style so its just an idea.