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I'm reaching out to get some guidance on how to properly insert the lead into a mechanical pencil. I've encountered some difficulty with the process and would appreciate a more detailed explanation. Sometimes it feels a bit tricky, and I'm concerned I'm not doing it correctly. Could you provide step-by-step instructions or any tips to make sure I'm handling the lead the right way? It would be super helpful to know if there are any specific techniques or nuances I should be aware of, especially if I'm using a certain type or model. Thank you in advance for your assistance!