318 head porting for the average joe

Here is some more work on one of the open chamber 318 heads. I posted some pics a few pages back, and I've been looking at some of the work others have posted, and it was clear that I was safe to remove some more material from the guide boss area. I hope I didn't hack it too badly. For you guys who know what you're doing, please give me some feedback. I'll take any advise and constructive criticism you've got.

318 Head Porting 129-1.JPG

318 Head Porting 129-2.JPG