Based on a .7ft resin block, the system is rated at 4#/18,300gr, 9#/25,100gr and 12#/27,500gr. A quick calculation gives me 10#/25,900gr. Using a CAPG setting of 280 equates to 2800 gallons when I multiply by 10 (per manual), tells the system to regenerate after processing 2800 gallons of water. Since my water hardness is 7.5gpg, I multiply 2800 gallons by 7.5gpg giving a result of 21000 grains. Since my salt setting (sltp) is 10, the system can process 25,900 grains...max. That gives the system some room before reaching the max. I will makes adjustments to this number over the next few months depending on the quality of the softened water based on my initial calculations.
Also, the Brine Draw/Slow Rinse Time (br) of 71 is OK. A setting of 60-65 is typical.