Tack and thanks, Kalle and Joe!
The pieces are the arms for the lift cylinders, you can see one behind the cylinder in my first posting of 03-01-2016.
Yeah, I ordered two each of the right and left arms but got three right arms and one left. So, one could be really funny here and say that they didn't get it right although they tried hard to make everything right
And one right that is left will be returned
so hopefully I'll have the right one, i.e. another left arm, soon, very soon, so consider this an arms race
Stefan