I am surprised no-one has suggested making one. They are easy to make, and can be built from castings or stock material. In that way it could be the size one wants and as rigid as required. There have been many designs in ME over the years, but even without then, they are so basic that it shouldnt be hard to sketch something that will do the job and use whatever is in stock / the scrap box. The main thing one needs is a milling machine...... Alan Stepney http://www.alanstepney.info Model Engineering & steam engine information pages MODEL ENGINEERING DISCUSSION LIST. To UNSUBSCRIBE from this list, send a blank email to, modeleng-request@xxxxxxxxxxxxx with the word "unsubscribe" in the subject line.