This is the bed way for the 7x16 mini lathe bed extension kit.
You must drill and tap 9 holes in the new bed casting to match your lathe. You need three metric taps: M3x0.5, M6x1, and M8x1.25. If you don't have metric drills, you can use letter and number drills for tap drills. (The sizes are given in the bed extension instructions: see Chris' Tips tab for 1928.)