flyintexan...thats in impressive haul.
Is the motor you are using a 12 or 13?
The F3A fraternity in the UK is quite a small group and to have 2 or 3 failures of the '12' in so few flights is concerning.
I have to say that replacements were provided without question.
Even the higher priced '13' is very competitive if it remains reliable.
Keep on winning.
Regards
Adrian