A simple fix if you have the ingredients are a pair of adapter plates to set the front castors parallel.
You will need possibly 16 new csk screws , 4 up 4 down on each plate.
That still won't allow the front to move sideways for simple alignment should you need it.
The castors on my trolley jack are a pig too , seems if I pull it, it tracks ok , but doesn't like being pushed into position which is how it should move smoothly.
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