I'll throw my hat in the ring as a supporter of this video & technic. Heat differential is a perfectly valid approach. As for stuffers, Husqvarna 346, 550's, 562's, 575/576, and a few others have stuffers. They are cheap. Typically using a torch or gun localizes the heat more to the cases so those Stuffers should be OK. Pretty common in the XP line. I have used a wood stove (for video impact), a hot plate (VERY useful for installation of bearings), and a heat gun (most common now coupled with thermometer for virtually everything) to get to a case temp number around 250-270 degrees Fahrenheit plus or minus. Coupled with a non contact thermometer to keep from OVER doing it, especially with those saws with stuffers requiring a special tool, a fairly easy and inexpensive way to get cases apart and or bearings out. Its how I take apart the Stihl 066-660's, rather hammer on them anyway..
Usually the bearing stays on the crank and then a simple bearing puller can take them off....SO bottom line. The concept works across a broad range of saws. And I prefer not using a torch, just a little nervous with the "when flame meets Magnesium" thing, even though I know intellectually chances are its not going to be an issue. My two favorite approaches are heat guns and hot plates (for installing bearings) . AND with heat guns, its easier to keep the paint from going dark burn color. Good stuff. And Matt....I'm personally more interested in the stuff YOU have designed and innovated, as there is plenty vs. repeating the other guys stuff. What ever happened to the mill and your experimenting with that vs. chainsaws? But this certainly is a nice video for the "simple tools" folks...
Good fundamental technic for MORE than just chainsaws.