Thanks for the info luke33, that's good to know.
Anybody know about the second? Am thinking the only differences between them is the windings / impeller. And since the new kit comes with the same impeller, the only thing that would affect flow would be rotational speed. So, does a 1200 spin faster than a 600? or does it just have a bigger impeller and stronger windings to push it, thus, with the new kit, both would flow the same with no head pressure.