I have not started pouring plastic yet but I would like to pour senkos up to 6" in length, and crayfish up to 5". I'd really like to know if the bottom pourer is better or worse then an injector. I'm a little worried it might not fill the cavity the way an injector would. I'd like to pour in high quantity to sell locally. Any advice would be awesome. My shakey head jigs are sellin well, so this will add on to what i've started....