Sorry to jump in out of nowhere but on the DD. I dont understand why people are having so much trouble with it. I ordered the parts linked from bladecprepair.com and installed the setup in tractor formation. The only thing I did different was use a gws motor mount which was far more stout than the one list on bladecprepair.com and installed a rubber like tail fin separately. I have flown mine for at least 10 hours and its still working great. I also notice very very little drop in flight times and the heatsink is only very warm after flight not ever hot. Maybe I am just lucky but my gut tells me that I am not that lucky. I am not with anything else.