If you have this and don't need it, what say you? And, any clues to putting it in? Side question 2: I'm missing that RT510 (3TF7) tube. Is it really needed? Side question 3: I'm also missing the hold down for the crystal oven plug in. Any around? Thank you, Doug W5JV Visit https://www.qrz.com/db/W5JV for some great vacuum tube finds.