Sinyo,
As you can see there are many differences of opinion:argue:. Some of which are so stubborn they cannot see things in a different light even when shown examples:flame:. That stubbornness is one reason I do not frequent this site nearly as often.
Now to offer assistance for you question; there are many means to obtaining a sinking lure that you will need to experiment with. The most obvious is add weight. You already found out this kills the action:pissed:. Another option is to reduce buoyancy without adding weight this can be accomplished in many ways, redesigning your lure profile, using denser materials, using plastics instead of wood, creating a hybrid lure by combining different materials, or whatever else you may think of.
Remember it was once said that man cannot fly nor will we ever walk on the moon and we do both quite regularly. So don't let ones negative comments:boo: disguised as good intentions get you down. All I really can say is keep trying and you will succeed:yay:.