I have a leaking petcock on my 250 sx when i put it on reserve. I have 2 of these original ones and plan on trying to drill out the rivets carefully and find the right size o ring after so maybe i can ride it Sunday...Just looking for a thread on it and some tips from people who have done this...Do you also drill the rivets out while the petcocks in place on the gas tank so someone can hold it steady...I have a vice but seems like it would get squished....Thanks