Yse, I did like DBCherry and made one in Excel. In my first, I put my plane, number of landings, number of take offs, time in the air, total time in the air, # of flights for the day, total number of flights. Things like that. I tried adding the battery info, but the spreadsheet became just too much for one sheet. I figure that I will build one from the ground up for batteries. Probably when Spring and flying weather gets here. I am beginning to experience withdrawl. In the past couple of years we have had some days where you could fly. This year has kept me home building. Although yesterday was the worst. The temp was 20-25 most of the day and since my building area is in the garage, my kerosene room heater just wasn't up to the task.