Tim
I guess I am aware of this, but many other guys here and on FB have mentioned they use 50:1 (even less) and I did get the recommendation from Parajet - even they used 50:1 on my machine (which is documented). In the past 6 months, Tom's had more air time on my machine than I have and I was using 40:1.
Cas - As per the original problem - starter cord seizing after 10 - 15 minutes flying. Then it's OK after 45 minutes. Very weird.
So, not really yet, need a few short flights to confirm the ratio, with plenty of pug checking