Second shot suspension Sumiko Blackbird - help

I have a VPI TNT Jr TT with JMW 10 arm and the second Blackbird suspension is shot in 3 months - base drags on record - Tracking force 2.0 gm - checked 20 times - anyone else experienced this? No trauma, handled like a baby? Any thoughts please? (Never happened with Shelters, Denons on other TTs). I dont think I'll get another Blackbird - the angle seems so narrow that even when new the angle must be minute between stylus and bottom of shaft.