Over centre hand brake hitch set-up

[Simon B]

I should know this but I dont....

The generic set-up instructions for most over centre hand brake hitches show a small gap (2mm-3mm)between the end of the damper (in extended position) and the pawl that pulls the brakes on.

1, Now, if this is set up as per instructions is there a possibility that the trailer brakes apply quickly and harshly causing wheels to lock and skid?

2, If there is a large gap allowing the trailer move forward rapidly under braking and impact with a thud resulting in a bit of shove from behind could this lock and skid the wheels too?

I believe set-up 1 shouldnt lock the wheels, do people have a rule of thumb technique for this process?