I have been running a 20x6 semi simitar prop from RedWing RC on my DLE 30 and the engine loves it . WOT RPM's are around 7800 and a lot of power . I had been using a Zoar 19x8 which worked very well but the RedWing 20x6 is even better . I am not sure who makes the prop for RedWing RC or how the Redwing will compare to the Zoar WW1 prop. But the DLE should be able to handle it after a good break in on a 19x8.