Thanks Av8tor.
You're absolutely right. Those new 30cc short blocks are just crying to be converted.
For it to be economical, I'd need to stumble across a worn out parts only 30cc in order to get the needed carb, muffler, prop hub, back plate, mount, etc.
The PT19 now has 4 flights under its belt, and the idle keeps getting better.
I am liking this magneto engine.