By the time you set the CA bottle down...it's too late to adjust it.lol
Go back and read my method. You adjust the gap BEFORE you apply the CA.

I imagine a crack will develope.
You imagine wrong. CA hinges are made of mylar with a cloth bonded to it. The CA soaks into and sticks to the cloth, it does not stick to the mylar which is the actual hinge material.

To restate my directions:
The CA should only be applied once to each side.
Only thin CA should be used.
The CA should not be allowed to puddle on the hinge or in the hinge gap.

Dr.1