I know this is a noob question, but I don't want to get this wrong. Can someone tell me how I should remove the tubes from my Fender Twin Reverb Reissue. Is it just as simply as turning off the power (the amp hasn't been on for about 2 months now), put on some gloves and pulling out the 6L6s. Then I'm not 100% sure about the 12AX7s. Any suggestions?