The thread title almost covers it. Can someone give me the $ 5 explanation of what Reentrant means, and what is Not reentrant ? Maybe also explain the basics of why I should pick one of the other. I feel like I've read a million threads, and even used the search function, lots of mentions of reentrant, but no explanations. Maybe I missed it somewhere. Second subject for this newbie.... Is there a tutorial somewhere that explains a simple way to restring a uke or classical guitar and do the string tie on the bridge ? Thanks in advance !