Please post a picture of the thumper and the coast.
Here you go.
I have started making a new bait and fish attractor, using the thump sound.
It is a machine incorporating a 12 volt, sealed, variable speed, electric motor, and a rubber mallet.
It comes in a 10" X 7" battery box ready to mount in any boat.
I've tested the "Bobo's Thumper" in my boat and it really does work!
Prices range from $225. to $300., depending on the available options you might want.
You can send a PM or call the number in my signature to discuss the different options and get a quote for your new fish caller.
I am located in Springtown, TX. You can come by and pick up your newly built fish caller or I can ship it for an additional fee.
Check out these videos to see how it works.http://s1301.photobucket.com/user/jbobo1/media/fishyfishy1%20001_zps7wblkqz9.mp4.html?o=1http://s1301.photobucket.com/user/jbobo1/media/fishyfishy1%20002_zpsgy0wwlhw.mp4.htmlhttp://www.4shared.com/video/8Mq0x2ruce/thumper_vids_010.html