Can you tell me how old the battery back up is? Have you tested to see if it still holds a charge well? If so I'd be interested and probably could pick up this weekend, if you can meet me at a train station.
No, sorry. Out of all of my equipment--Apex, Vortechs, etc--the skimmer is the only thing I'll be holding on it. I haven't found a skimmer in this size range that pulls more air or is this quiet. The ATB 840 v2 might be slightly more efficient energy wise but the v1 and v1.5 pulls more air.