spool weight universal for most spools

I wanted a weight that I could adjust the size to the spool without worrying it will move within the spool, adjust itself to random spools and not rattle weights around. This just works. Just load batteries , screw in battery cap (no matter the size of your spool it will hold batteries in place, tighten to fit your spool. DONE. I have tested this with as many spools as I had and it worked with all, you can see several in the pictures listed. Included are 2 different battery retainers if you feel like you will not over tighten and break it (like I did) you can print the single file. Otherwise I would highly suggest printing the multiple part file for strength. place the battery can down and grab the 2 halves and gently screw them together into the battery can until both halves are flat to each other ( you don't have to screw it all the way down) 2. Once the 2 halves are flat, take the disc and glue it to the 2 halves that you have locked in place, being careful not to use too much glue.