Hello AZcat, I don't think Hurri was speaking about the collar not holding against the pull or stress of the control surface pressures. I am just reading between the lines and I think he was refering to the collar coming loose. (set screw).
I have a 4*120 and sent in a tip with a picture of the radio gear area. I got ALL kinds of replies, NOT to my tip, but to the connectors I was using on my servo arms. I was using 4-40 E-Z screw lok connectors. I did change to good ball link connectors after reading all the replies. I guess better safe than sorry. I still have some screw lok connectors in my 40 size planes and I will not be concerned about them as I usually do good maintainance and "keep an eye" on things...
lownslo.....

Bob

PS. Ive got a good friend in Sun City Grand.