Hi, still there in the forum? Can you explain more what did you adjusted to solve the issue?I had this problem too and want to share my fix. For a DIY mechanic, this is what you need to check and it is easy peasy.
My locking steering at full cock problem is solved by doing a front end alignment. The problem was caused by the wheels being towed in too much. This is easy to check using the string method. Stretch a string from the front to the back of the car at the center of the wheel. Adjust the distance of the string from the center of the wheel so it is the same for the front and back wheel, I was about 4cm away. Then measure the distance between the string and the edge of the rim in the front and back of the wheel. I had an 11mm difference toed in. I adjusted the tie-rods to get that down to 1mm and the problem was gone.