I've been thinking about making a bullet tray for my 650 and here is what I came up with.
I started with a piece of 16 gauge steel from Lowes, any gauge you may have laying around will work but I think 16 is as thin as I would go. I cut a piece 4.5 X 6 inches, rounded the corners and filed all of the edges to remove any sharp spots. I had to drill 2 each 1/4 inch holes to accommodate the bolts that hold the press to the Strong Mount. I did not think the 16 gauge steel would tip the press too much but I was wrong and installed 2 each 3/8 inch washers on the other side to correct the offset. After it is installed all you need is a 6 inch stainless magnetic parts bowl and you are in business.
Merry Christmas
Tom