I dont remember plans like that. You did some work in horn response that gave the best angle for the conical throat since I wanted to make a seperate aluminum throat piece. Not only dont I remember plans for any type of horn like that. The horns I've been making have curves sides. not flat. and the top and bottom are not curves but a straight +10 degree in proportion to the flair rate. Good luck with your new horns. The cnc stuff sounds cool.