rgr that, just make sure whichever screws you choose they dont screw in too far or you will knacker you board. think its 10mm clearance in the screw holes before it starts chewing up the silicon etc
The only problem with that is due to the rail you will end up with a drop of nearly an inch, if you have the skills/access to miller and dont mind paying planet a fiver to re-anno i'd still machine it.