I think most folks around here know what the blob targets are. The ones with the carpet backing foam sprayed into a box. Best targets there are. Anyway I have been through a few, usually when the center gets shot out I shoot at the sides and then parts of them get used as broad head targets. The center on my best one got shot out. So, yesterday I took my chainsaw and cut roughly a 7 inch square all the way through the target removing the shot out center. I then sawed a square section from a piece of an old target big enough to tightly work into the hole in my good target. I then sprayed some Great Stuff in the cracks to help fill them in and also act as glue to hold it in place. Looks like it should last as long as a new target and didn't cost anything as I already had the foam.