The feetpads of the Hercules tripod have a single hole through them for mounting them onto... something!

So, I just ran a wood screw through each.

On my other ones, the tripod tips fit into holes in the 2x4, and the Springfield is sitting on a "tray" (first one I built has a floor for putting the drive corrector and stuff on. Gravity is hold those scopes down. When I push them around, I have a firm grip on the tripod, so they haven't fallen off (yet).

-Tim.