El Cajon Hobbies at 1571 Magnolia Avenue, El Cajon, California.

Most of the staff is pretty knowledgeable about parts and repairs. If you are going in to spend money on parts or repairs, try to ask more than one employee about it to make sure their advice or skill is adequate. Not everyone that works in there is a pro, but they won't tell you that and they don't wear signs. Good shop though. Almost always have what I need and it's close to me. I have also found that their prices are right inline with internet dealers or even a little cheaper.