Also remember a check like that. The collective friction is critical on the S61. Saw one once get a "collective bounce" on landing and it was not a pretty sight nor where the tail wheel schock in a good state aftewards. Normally with collective friction off the collective's tendency should be to creep upwards and not drop down for obvious reasons. There has been a few issues with the 61 friction and can remember at least 2 SB's after North Sea(I think) incidences. I know one was with the lock interfering during flight. I will check with some friends tomorrow if you want who are stil active and has 30 years experience on the 61 and will give you feedback.