Argo Navis can be used with it if you order the mount with encoders. You will need the following:
Mount obviously
Encoder kit - Ask Tom to quote a price just for the encoders as his site shows the full kit with SkyCommander. He quoted me a price of US$275 for the 4K Encoder Kit
8" Extension (to be able to point it close to zenith without banging on the tripod)
4" dovetail (for Losmandy D plates) and dovetail converter (if you plan on using Vixen plates)
Possibly the handle depending if you want to use a handle or just grab the diagonal
Here's a
Dropbox Link (will keep it active for a few days) of some cameo shots of my FC76 and DM-4. I eventually got the extension as well - just in time for this year's Messier Marathon (107 out of 110 - darned clouds kept M110 and M32 from being seen prior to them going below horizon and then M30 was simply impossible with the Sun racing just behind @ 5° above horizon over the sea).