swimbait?

after watching a few of the tournaments recently it got me all jazzed up to try to make a swimbait.  unfortunately i dont really know how to do it but would like to avoid pouring two halves and then gluing and painting etc.  what i would like to do is make a mold and then just be able to pour them the color i want and then use minimal paining to get the look i want.  

i also was interested in making a bait that did not need any additional weight.  i was thinking about salting it and thought that even a bait that was small by swimbait standards would be plenty heavy.  the big question to me is if they will run true without a weight in the head.

excuse my ignorance as i know almost nothing about swimbaits, so any help would be very much appreciated.  i was thinking that a shad modeled bait, with or without the indentions on the side that are featured on some baits would be cool.  i was thinking that i could use some sort of big hook rigged with a stinger might work.

matt