I am attempting my first graft as soon as rootstocks arrive. I have read several articles, but am left with few questions. My understanding is a scion should be of last year's growth. Also the scion should be close to size of rootstock. It appears to me on the tree I am cutting scions, they are all relatively small, being at the end of branch. Most appear smaller than a pencil. If the rootstock is larger, should I use an older part of branch to get a larger scion?