In reply to JayPee630: Dragons use different sizes. Approx sizes are Dragon 1 = 1.25 4CU, Dragon 2 = 1.75 4CU. After that it's a bit more complicated since the dragons have greater range because of the double axles. Look on DMM's website for details.
If you want sizes consistent with your 4CUs, check out the new Demon cams.