Even after scraping away excess glue in step 12 there may be some uneven edges along the glue joint or some glue smears. Use a sander, like the belt...
Step 4: The solution
I hinted at the solution in the title of this Instructable. Place the locked puzzle on a flat surface. With your finger and thumb, spin the puzzle as rapidly as you can. This creates a centrifugal force that flings the dowel pins outward from the center and releases the two pieces so one can easily be lifted from the other.
Bio:I miss the days when magazines like Popular Mechanics had all sorts of DIY projects for making and repairing just about everything. I am enjoying posting things I have learned and done since I got my...read more »