I would go this route,
http://do-itmolds.co...ory&path=1_8_28
Use the 3434 mold,it takes the same hooks as the ball jig you were looking at so no change there, it has the double keeper, and if you don't wan the weed guard no problem just trim the pin so it sits flush and pour away as many as you like without modding the mold and getting all the features you want.