Everytime i try to boolean i end up getting tabs on it. Am i doing something wrong or is there something else i need to do other than just choose one item make it positive and the other negative then group them. You can see by the image what i mean. this happens all the time and i have to group two bits together then add two squares squashed down, make them negative then group them just to remove those tabs. If this is what i have to do so i can build a model in bryce i'll leave it to others, seems like to much trouble just to make arches for something. PS: that is a positive sphere and a negative square which i used just to show you what i am on about...it happens no matter what i use.

I have opinions of my own -- strong opinions -- but I don't always agree with them.