I am getting varying information in my research and wanted to post to see if I could clear this up. The transistor I need to replace is a P22NE1 (pic below). I purchased a P22NE10L (pic below) thinking, from what I have read, that this was a suitable sub. Am I correct? Also, does the dot or round indention above one of the legs signify anything? The old part has that on the middle leg and the new one has it on the left leg.