Tim, sorry I forgot to mention this in your other thread but the Mag 7 has a problem with re-start. There have been threads about this in the past and I personally owned one that had this problem. It dosen't seem to effect the other Mags, just the 7.
What happens is when the power is cut off and then comes back on the Mag 7 just sits and cavitates. It appears that there is some kind of design flaw with this model. My pump was last years model so I can't say if this has been corrected or not.
Steve