No Wah and apologies if this is a bone question and has been asked before. The Safety pin on the spring arm, what is it actually supposed to do? we spent ages trying different ways to secure the spring/wire and anything else that might need to be safe yet it doesn't seem to make anything safe. Even asked the local know it all but got nothing. Looking in the pam it skips over it, no pic or suggestion about its role. Am I being particularly bone and missing the obvious?