Quote Originally Posted by CTom View Post
You are better off clamping the mold together with a c-clamp, putting a countersink bit in the drill press and boring the opening out slowly if you think you need to open it up. All of the small pieces and parts will haunt you and that nipple may be 1/4" pipe thread but the hole is 1/8" or so. Slowing down the plastic flow is definitely going to create issues on some baits.
ctom not all the Jacobs molds have enough room to make a bigger porthole by making them bigger some of the molds have a very little room because you're channeling of the plastic it just apparently underneath the opening some of the other molds you Plenty of room to make a bigger porthole by drilling a bigger hole in the reason why I made this adapter is because the molds that I have had very little room underneath the porthole is if you went very much you would ruin the channeling of the plastic so if you guys are going to make the opening on Rick's old molds bigger by using a milling tool you want to be very very careful I do not recommend doing this for most you guys if you are not used to working with shop tools you could ruin your mold very quickly the adapter is a lot easier and a lot simpler to make in you definitely would not ruin the mold .