hi, this may be helpful identifying potentially problematic tants. i would not replace them until you start having problems...but
if you were to do that, i would start with the ones flagged as previously failed.
https://groups.io/g/TekScopes/filessearch?o=0&q=465btants

ps. i lost ownership rights to that when the group switched from yahoo to groupsio so it is not maintained. i have not seen anything
worth adding in a while though.