I recently dug an old air rifle out of my store room that I had even forgotten I had. I've been told It's an early PCP model (?). For it to operate it you have to fill it with a tank. Does anyone have any experience with these old Crosmans? Where can I find out how to fill it? What does the fill attachments/equipment will I need? ***Note to Moderator, the previous post in " springers, CO2 ..." was before I knew this is an old precharge rifle***