Nice! Did you continue using the Vibroplex semiautomatic bug?
I recently discovered this short video with the same kind of Vibroplex that I acquired in a USEC (https://www.allacronyms.com/USEC/United_States_East_Coast) port in 1965, when I was a sailing radio operator. I estimate the speed here to be above 30 WPM, and it equals the speed I mastered at the time. I still own that Vibroplex, and the video inspired me to practice more so I can reach that speed again.
What I really would like to have is a wristwatch similar to the one you see in the video. It was for sale by a British company for about $200. Unfortunately, they were sold out by the time I had saved enogh to buy one.
For listening training, I am adding another semiautomatic bug transmission:
That's not a Vibroplex though, it's this one:
https://www.i1qod.it/index.php?option=com_content&view=article&id=11
I want to suggest a new board:
"Morse Keys".
I have lots of links to put in there if my wish is granted.