The posts are supposed to fit in very very tightly , just take it slow . You don't want any play at all once you get them in . You should not be able to pull them out if you wanted to remove them by hand .
To remove the posts if you ever needed to you would want to use something similar to the below without the nut and bottom piece attached . You would center that see through tube over the Floyd Rose bushing and screw the bottom into the bushing and tighten the top wing nut . It will slowly draw the Floyd bushing out no matter how tight it is . Many just use a PVC tube for this .
If you can pull the Floyd bushing out just by hand force it's too loose.
The below is used to remove knob's on expensive guitars to avoid finish damage.
To remove the posts if you ever needed to you would want to use something similar to the below without the nut and bottom piece attached . You would center that see through tube over the Floyd Rose bushing and screw the bottom into the bushing and tighten the top wing nut . It will slowly draw the Floyd bushing out no matter how tight it is . Many just use a PVC tube for this .
If you can pull the Floyd bushing out just by hand force it's too loose.
The below is used to remove knob's on expensive guitars to avoid finish damage.