englade, does this mean that after using this innovative solution for a while that the tongue remembers where it's supposed to be and will remain centered afterwards? Btw, very creative and less risky than getting a cobbler to apply any stitching to hold the tongue in place.
Another trick is to put on your boots make a small mark through a lower eyelet at the top of the circle . Go to the eyelet directly above and make a similar mark at the bottom of the circle . Remove your boots , punch two small holes in the tongue then stitch the tongue to the upper through the holes and then through the eyelets . Be sure to use eyelets low enough that you don't need to pull the laces out at that point to take the boots off and on