http://www.smart-fly.com/Products/Ignition/ignition.htm (see bottom of this web page).

Use the Cermark or JR HD switch (same thing). It's perfect for an ignition and I just put one on my DA 50. You need to cut off the ignition side plug of the switch and solder on DA's HD ignition power connector/leads. I used a Dean's Ultra connector on both sides of my switch and did not use DA's. I like Dean's better.

PS: DA does not recommend standard switches, they need to be HD. I called them.