What techniques do you'll use to stop a rattle bait from rattling?  Specifically, I would like to take the rattle out of Red Eye Shads.  Thanks for any help you can provide!

try drilling a little hole and add a little super glue,i think muddy came up with this idea

I don't know the construction of the Red Eye Shad, but I know with the original Rat-L-Trap, you drilled a hole in the bottom right in the middle of the two hook hangers.  Either take the lead shot out, or fill with glue.  

There are also lipless cranks available that are silent, the Sebile Flat Shad is an excellent option. Also, Ichiban tackle offers Daiwa lipless cranks in a silent, one knocker & rattling version.

Thanks Primus, I do plan to get some Flatt Shads!  I have a bunch of Red Eye's so I thought I might try modding a few to get a different sound/no sound.

I've been very pleased with the Flat Shad, especially when I'm fishing clear water on a sunny day and my gut tells me a rattle will spook the fish.

The Yo-Zuri Live Bait Shallow Vibe is an awesome silent lipless. It's a little heavier than similarly sized rattling baits - since it is solid plastic. But it casts a mile and has a great action even at very slow speeds.

Yo-Zuri suggests that it is soft, flexible plastic. It does a rather soft, very smooth texture, but it is not flexible at all.

 

I tried gluing the rattles in a rat-l-trap and while it worked, the bait now weighs a little more. Sinks quite a bit faster than a regular trap.