As is typical for your video productions .... this one is truly excellent!
I love both the R01 and R02 and there is really very little to choose between them. The R01 is a bit more elegant to my eye, while the R02 is a little more compact and robust. They both run like champions and it is most impressive to get such good running out of engines that are really rather small.
Thanks for your efforts to share this wonderful engine with us all!!!