Making a chuck back plate

My latest project, Is one I have wanted to check off the list for a long time. My lathe didn’t come with a 4 jaw chuck, and I’ve always found workarounds when I needed one, so recently when I came across a good deal on a chuck, I snatched it up. Since my lathe doesn’t use a standard chuck mounting scheme, I had to turn a custom back plate to mount the chuck. Making a back plate is usually a fairly easy task, but since I didn’t have a chuck big enough to hold the back plate blank, I had to devise a work holding scheme using my face plate. This video documents the steps I used to make the back plate.