Why yes, yes I have. 
(T-40 rather than -20, though)
You’ve probably nailed the rationale behind it.
Regarding burr wear - my sister has an old burr grinder that stopped grinding well; would barely grind at all. I took it apart and told her it was done for - they were smooth as silk, even polished looking. Then I put it back together and it worked just fine! SMH. (She likes a relatively coarse grind)
My hopper barrel is getting vertical stress cracks in the clear polycarbonate but still holding up. The white body is now more like a light beige or dark eggshell instead of the original white, I guess from years of old fluorescent lighting before I put in can-LEDs. I have two rubber bands around the grinds box. One horizontal to hold it up against the main body, and one vertical to keep the lid on. Otherwise it vibrates itself loose and starts blowing grinds all over.
