The sales rep was very helpful in answering all question plus sending a YOUTUBE to help see how to back flow the hose for cleaning.
I have done this several times, I wish the valve seats lasted longer
Have you tried adjusting the handles prior to replacing parts https://dishmasterfaucet.com/pages/ts7-adjust-handles
Have you replaced just the K0858 valve stem ends only without replacing the seats to verify that the seats do need to be replaced? Please send pictures of the old seats to email@example.com