If you have an MFT (or an MFT table top bought as a spare part)
clamp the 3/4" MDF on top of the MFT, then
drill 13mm holes using a brad point bit at every wanted hole location
from underneath the MFT top, then use a 1/2" copy router bit
from above the MDF piece to
That way, you have exactly the same hole diameter as your MFT top,
whatever it is ...