I came across a post on the rimfirecentral forum that Brimstone is no longer accepting your factory 1022 trigger packs for rework. They are going to offer their own trigger pack in the near future. So, don't send them your factory 1022 triggers 
https://brimstonegunsmithing.com/tier-3-basic-ruger-10-22-trigger-work/
https://brimstonegunsmithing.com/tier-3-basic-ruger-10-22-trigger-work/