I have been using the ardent culling system. The ones that you can spin the balls and put the weights on them, but im tired of them rolling around in the floor or the tackle compartment. What do yall recommend to mount/hang those?

I hang my cull tags from the spray bar in the live well. 

I cut a small piece of aluminum angle and drilled holes to hang mine from the live well lid

Some boats have a downward curve around the live well.  Drill 5-6 holes slightly larger than the cull tag.  Hang the tags there.  Bass Angler Magazine had a how to about this. 

I made a rack for mine out of a cutting board to put them almost under my console (close to my bump board and livewell controls) I'm thinking about changing them to put them in the livewell though.

Mounted in my livewell