Just to update on this topic, I've now had all 4 handles replaced (the not retracting issue). But a new issue only 2 weeks after last repair, now the two fixed handles retract but don't unlock the doors. Hopefully Tesla will fix as it looks like relating to recent work. If not, I'll let you know about how good Redbook really is (I've only had 2 services in 4 years, but that is not inconsistent with the advice given).