I’m also working on an own made VST for exactly these timestretch effects. Similar to the AKAIzer tool. But without the need to export it as a sample again and also with less metallic sounding results. Just load your sample, tweak some knobs/buttons and play some notes. 
That’s awesome! Sounds similar to Metal Mickey. I’m sure you can also create this effect with a comb filter, which is pretty much the same like what you can do with Metal Mickey, but with less control. Your example without any VSTs or else is surely the best way to do so, but when you finished your VST I guess this will be the one for these effects. It’s a matter of time. 