Here are some of the many I did back in the 80s/90s.
The photo at the Chicago hobby and Model Show with the lineup of designs under MIA Designs, I did as a way to test the waters, so to speak, before I embarked on forming MIA Micro-FLIGHT was actually taken in 93, but the date shows 2003 because that is the time I posted that photo online for the first time.
MIA Hughes 500 R/B Iconic Rubber Powered Helicopter redone this year from original plans. This video shows details.
https://www.youtube.com/watch?v=XpfnNn8Yyq4&t=10s