I kinda figured that an empty chamber would be the best, I need to get more detailed, What im doing is reworking a hard swimbait to be about 1" shorter, like 3" long instead of 4", This makes that swimbait a lot more interesting to our little Ohio bass. When im done with mods, paint and top coat it makes the floater model into a slow sink (not a problem) but i can think of times when the floater would be the best.. actually i would like them all to float and add weight when needed. I had one that i drilled 4 - 1/8" holes evenly spaced from the hook hanger to the line tie and installed 4 wood dowls, this seemed to help, but i think its because the keel weight is located in this area so it lighten it up some and also ballance the lure out.
used smaller split rings and smaller lighter hook.