I agree with rocketgeek101 ,on most of my builds, I drill and tap for the screws and epoxy them in tight.
There are times when on certain rockets,and depending on how I built it ,I use a standoff or backer inside the BT and drill and tap for two sizes of rail buttons, so I may use either a 1010 or 1515 size and simply unscrew one and change over to the other.
If the rail slots are kept clean ,the nylon type buttons will last longer , Delrin longer yet.
Happy flying !
Paul T