Endust,
I believe I know why the tooth problem happens on a regular basis...
In the Factory Shop Manual on changing the chain... it specifically states that " pressure must be kept on the chain" .... this with the fact that people do not rig up something to keep the chain DOWN at the cam sprocket ( there is a factory tool shown for doing that ) it is easy to skip a tooth due to gravity working on the load side of the chain while the oil pressure is not being supplied to the chain tensioner on the non load side...