Hello! Before jumping into actual experiments, for time saving I would like to ask this question: attaching particles (smoke, sparks) to chunks of destructible mesh - yes or no? 
Is it possible at all, and/or is it maybe better way to have actual mesh combined from parts from the beginning, and separated on destruction (with particles or whatever attached)? Thank you in advance for hint on this
I wish very much that I had discovered this thread on Saturday. I spent roughly 14 hours trying to troubleshoot my Destructible mesh behaviors. This is a goldmine of information. Thank you! I am absorbing as much information as i can.
Somehow - when downloading the destructible Mesh Blueprints, i get a load of "Create Export: Failed to load Outer for Resource “SceneThumnbnailInfo**” Errors, and some more.
I cannot open the sample project without errors, and blueprints and meshes are broken.
Tried it on 4.20, 4.19 and i think 4.18 is the first version, saying it is too old to open this project.
I tried to erase cache and start it fresh from the archive - no luck at all.
Any hints ?