You can still use the original Clam Drill Plate with the K-Drill, but you will need an adapter. Vexilar makes one that works. If you go to the following page and select "Adapter for Clam Drill Plate" from the drop down menu you will see the item.

K-Drill Items and Adapter for Clam Drill Plate - CLICK HERE

$14.95 is the price. You will need that adapter no make which Clam Drill Plate (new or old) that you get if you plan to use the K-Drill with it...

Awesome combination for sure! I use the Clam Drill Plate with the K-Drill and it's tough to beat!