That tutorial is what I typically go by.
My latest failure last night was when a front seciton I was working on ATE my feed housing. After tapping for the housing, I screwed it in to check the depth to see if I was flush and it seized into the section. I must have forgotten to clean out the hole before test fitting and bound up some debris in the threads. Ended up destroying the feed and housing to get it out and then killed the section by cross threading trying to clean up the internal threads.
The prevoius one yesterday sheared the outer threaded section off.
I think I've found almost every way to screw these things up just this past weekend.