Yes Alberta. The 426 works the same, but the board is turned around a little. You can still pick up a 5v trigger of pin 2 of the big IC. It is easier to solder to J2 on the front of the board, located just above the small IC . The main drawback I see is that it is difficult to mount a timer board (like Brians or JoeD's ) directly to. Still working on that one. They made the 426 board in a different shape. But except for the layout, I believe the board is essentially the same.