Paint tub unloading using plywood slide - GIF

Paint tub unloading using plywood slide.

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Previously:

https://www.homemadetools.net/forum/...166#post195660
https://www.homemadetools.net/forum/...623#post205728
https://www.homemadetools.net/forum/...702#post170671
https://www.homemadetools.net/forum/...094#post125766

Looking at the big stack they apparently already unloaded, you would think they would have a more efficient system.
Granted, if they are going to take one at a time, this is a pretty slick method, but the whole truck worth?