I have the litelock? Motion Pro rimlocks.
I wrapped 1/4" rod lead weight (fishing) as mentioned above. Cept I wrapped it just once around the nipple at the rim. Then wove it around one more nipple then once around the last nipple. Then I melted the ends together with a red hot implement (while holding it all snug with pliers)
Tip, roll the lead stick weight out on a flat surface first. Then roll something over it to make it a little flat. It will hang onto the square nipple easier.
I have a HF balancer. The rod was bent but it didn't affect it's accuracy enough to matter.