I got to really try out the DD tail today. fairly fast backwards flight with sweeping turns and it held well. Its a really good match for the brushed motor. Also, I flew in idle up a fair amount and that worked well too. The DD tail spools so much more quickly than stock. After a few minutes of FFF traveling fast piros, etc, the tail motor was a bit warm. I think the key is just not to fly too long. I really wanted to loop it but the ceiling was too low for a first try.