Why not just go take up some of the slack on your low water level float that turns off your jet pump?
If your jet pump cuts out, you can let the slack back out and you'll be able to use whatever is left in the tank.
I have the worx and the one significant drawback I have found is that the chain seems to be an uncommon type that is hard to find locally. It's even difficult to find on the oregon website. That means ordering from worx at full retail price.
In my case, the electric craftsman would have been...