So, I'm leaving home around the 24th and will be gone up to 3 weeks. I'm thinking I should provide for a 2-2.5 fc loss per day while I'm gone and factor that to set my si-45 to run for 8hrs @ 80% the time I'm away. I'm also thinking to build my fc up to 10ppm prior to leaving to provide a buffer just in case my real fc loss is higher than 2.5 / day. Am I thinking correctly? If not, what might you suggest?