I think it's a school and the girls are making projects .
I don't have a Hitachi router but it sounds like the right size the best way is take your router down to Ace Hardware and pickup some Allen Metic Flat Head screws and try them in the router at the store just to be on the safe side,metics can be nasty to get the right ones.
....allignment.... the best way I have found to make it on dead center is to make a plug out of (plastic or wood ) and use your hole saws that have a 1/4" center hole in them and make the plug so it will fit the base or the insert and then use a 1/4" dowel pin or old 1/4" router bit, then take the same size of mounting screws and cut off the head and grind them to a sharp point then hand screw the screws in the base so the points are down.
Once you have the the plug made chuck it up in the router now place it on the bottom side of the table and tap the base with a hammer this will put center marks to drill the base, take a 1/8" bit and drill the holes and then turn the top over and drill the counter sink holes then drill the holes out to the 5mm size or just over.
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