I had the DL55 on my Reactor too, using the Jtec P51 Pitts. Unfortunately lost it on the third flight due to my stupidity in not checking batteries. Just got notice from Jody at Valley View that my motor was repaired. Will be putting it back in another Reactor. Only had about 1/2 gallon thru mine, but tached it just before that third flight, and was getting 7400rpm on a Xoar 22x8. Strong runner!