I had an high idle problem on a Wren 44 gold, and it would idle normally for the first 3 flights , then the idle would gradually go up with each flight thereafter, It turned out to be insufficient battery power to the ecu, the small battery (4.8 v nimh 600 mh) that came with the turbine was not up to the job, I replaced it with a 1100 mh battery and all was well after that. Wren's service is excellent, I am sure they will sort it out.