In my experience, kits that secure to the Phantom using only the front thumb screw are unreliable. You are stuck either with a handle that will wiggle loose, and they will, or securing it with thread locker at the expense of easy disassembly. I would rather use the stock pump handle over all kits currently made (save maybe Rainman's new one), with the exception of the Dually.
I love Pun's Dually kits:
They are a bitch to find, and are expensive when they do come up. The only downside is that you lose the vertical ASA. I have them on both my two Phantoms.