I handwrite all my letters which has a standard form that I use telling the project I'm working on. If I do have a memory of a particular moment in their career I'll share it. My project only uses balls, so I send May through October. Currently, I have 3 outstanding balls, all of which have real good return rates, but they do take quite a while. I must have looked through the Brewers all time roster hundreds of times and am still amazed of players I forgot or never knew were Brewers.