My on;y concern with the build quality is, that pivot point where the coil attaches to the shaft, is this an adjustable nut? or is it fixed up? As I can see it getting loose after a bit of use, especially if you fully fold it up each time after use.
Otherwise I will be looking foward to ordering one with the 20" coil
It will work well in the high mineral soils, as the delay in the release of it was becasue they had trouble getting it to work in the soils over here in Aus, so they just had to fine tune the firmware and then release it