As it happens, I often need to take a plane to a remote location for a little adjustment. The latest time I needed a bevel-up block plane, and my No 5 1/4, both Veritas.
When I got them home and started using them on a project, I felt the Block plane blade quite loose, as one grub screw holding the blade alignment was missing. I guess it was from the vibration of being in my tool bag, but naturally, couldn't find it even with a magnet.
I ordered a screw from Lee Valley, which they're sending out, but I decided that, since I often have to make little adjustments away from the shop, and I don't have any "beaters", I needed to find a way to secure the screws.
Another passion is riding my big, freak'n Harley, and you know how we love to tinker withn the things, I know the value of the larger tube of blue Loctite (insert the appropriate copyright sign here).
Backed off the screws, a dab of blue on the thread, adjust, the other side, and no more worries about them coming out. Works on Jointers, planers etc.