EZ Connectors work fine AND are reliable PROVIDED you put a drop of blue locktite on the screw before tightening it up. The blue licktite will let you loosen it up if needed, but will prevent the screw from loosening on its own.

Someone else suggested thin CA. You could use that in a pinch, however you run the risk of the CA breaking in cold weather of dissolving if the nitro fuel gets on it. Blue locktite doesn't have that problem. I have flown planes with an OS 1.60 in them that use ez connectors. No problems at all if you use the locktite.