The engineer who made this is unknown as I bought this from Myford, who in turn bought it and other machines and tooling from the engineers estate. The VDH is made to Geo. H. Thomas design, and was made to suit the Myford 10 range of lathes. For my uses on a Super 7, I made a spacer plate to obtain correct centre height. Unfortunately due to circumstances this is another item I had to sell.