A friend of mine (he doesn't belong to the forum) owns about a 5 year old Standard Vet in .25. And its in need of an "O" ring replacement. I tried looking on Youtube for a video outlining the procedure, but came up empty. Are there any members that might know if such a video exists? I would consider doing this job if I could find good instructions. Otherwise, who are some of the resident Veteran "mechanics" here on AGN? Thanks in advance