As  an inexperienced C model owner, I thought Sabremech's cowl mod looked cool but didn't initially get why people were SO excited about it.   I think I get it now.   For the first time on my own, I opened the top of my 48 year old doghouse, wanting to change my top plugs and RTV caulk some gaps that I'm tired of looking at.  It seemed like a simple enough job for an owner with boundless enthusiasm but limited experience and tools.  Well, years ago someone riveted shut the small side a