I would just beat a peice of 20 gauge into submision until it was shaped like a cone and then weld it in,, I could asure you it would work great..But that peice there looks pretty fancy bud,,I just like fabin steel and makin it do what I want it to do with great result 80% of the time,,LOL,,carefull though, it'll bite back sometimes,,LOL<,,Have fun looks like your on to a good start. I don't hunt on the feeder but about 100yards or so away useing trails that are down wind of it,,always hopeing a buck will be checking it before goin into it. Good huntin to you buddy,, JB