I too use the red Locktite, nylon cord in head to hold while installing/removing prop bolt into the adapter. I only Locktite about 1 diameter worth of threads and nothing has loosened up yet.

A Loctite usage question: When necessary to remove the prop bolt to replace props, is it necessary to 'chase the interior thread with a tap to clear out old locktite? I have been wire brushing the bolt and chasing the hub threads. Same principle on long shaft Ryobi.