You can put LockTite on the outer bushing threads with the screws already in them. Tighten the bushings using the screw. Let set for an hour or so. Use slow, consistent pressure to loosen the screws and they'll break free easily and leave the LockTited bushing in place.
Edit: Since you have the bushing tool coming in, what I wrote is most useful if installing hex or torx grip screws, since they "cling" to the bit driver and there's no fumbling.