I'm looking for an electric spreader for my large properties. Does anyone have any input on the different brands? I did a search and need a little more info. Lesco, Earthway or Spyker. I will be using it on my GD Surfer. Do I need a variable speed motor? Is one easer to mount? Durability? How do you turn it off and on from behind the mower? Is the Spyker for over $800 worth it? Or will the Lesco or Earthway do the trick?