few years ago i went to stop during a game and my frame cracked off the bottom of an ice book, nearly breaking my ankle (rolled it bad and couldnt skate for months due to ligament damage).
eventually remounted the same frame to the boot and used all copper. never had a problem after that. so, from then on I always use coppers on conversions. doesnt matter what it looks like to me, I just want to feel 100% confident that what I experienced before will not happen again.