I have always hated carpenters pencils, I bought a box of plain old yellow #2 at Walmart for 1.99 and a old school crank sharpener. There were 50 in the box so there are plenty laying around and always one in reach.
When my grandmother passed away we found a case of old mechanical pencils in a drawer. She was a executive secretary up til 1 month before she died at 82. My brother and I split the case and I have been using them on projects lately. They make fine clean lines. The lead is a little fragile for use on rough lumber but after it has been planned and ready for final cuts they work great. Plus feels like a little nod to G'ma every time I use one.