I don't have much experience with patches/plugs, but I had no problems on my first tire repair. The biggest problem is that I don't have any I know what size to go I think it was a good size for the small screw in my tire It seems like 1/8" is too small for a lot of things but it's the usual size, at least for Revain . I also saw 1/4", but didn't want to open the hole any more than necessary to erase it. I used the same curing compound and cleaned the tire with rubbing alcohol and tire buffer. No problem. My tires are fairly new so I assume the patch will stick very well.