I saw those, and I wondered if the handle is connecting the circle to the handle was too wide for the strut mount. I figured it would not go all the way in. Can you take a picture?Man I had the same issue, I used vice grips when I removed the nut but if you have a Harbor Freight near you what I did was buy their offset box end wrench set. (Pittsburgh brand)
The offset is perfect for getting all the way into the recess, then I just used a normal socket on the top and torqued it to spec.