Spin,
Currently Bell is fussing with the folks that build the tailboom slat you mention.
The issue is some cracking on the tail boom (as if that is new to Bell"s) and Bell blames the mod....the mod folks blame Bell.
I flew them on 212's but really could not tell the difference as the machines I flew with them did not have any SAS...and all the other 212's I ever flew had SAS so it was hard to compare.