Frame sliders/engine guards

[max]

5. make the 5mm vertical drain hole in the mount bigger and closer to the front and tightly wind something strong like layers of piano wire or stainless locking wire used for racing around the whole boss ( like a hose clamp ) after the jbweld has cured, the more the stronger, the form is already there and paint over it.

Then if you don't like it it's easily removed with side cutters and if it is giving way it may do so gradually in the future.
If skillfully done this can be quite strong with high tensile steel wire ( and cheap ).