This is a "modification" that is frequently seen but certainly cannot be legal in most parts of the world, and I would like to think definitely not in Australia ,where standards are normal.

The problem here is not really that the fork tips are weakened, which they are, but more importantly that there is no way to establish they lifting capacity once the "Mod"is done.

Refrain from this, the correct way is to purchase an attachment to do the job properly, they are not even expensive.