Just noticed on my PC monitor that I can see strange wear on bottom rings...anyone else seen anything like that. It was not evident by eye. Top ring looks to have sealed very well, so hardly any blow-by getting to 2nd ring.
Piston ring wear on a two stroke engine like this is more complex due to the extra flexing of the piston rings moving over the exhaust ports etc. The wear on each end of the piston ring is normal. Minimal wear should be found at the sides where the gudgeon pins are.