From what I've seen so far via Google, this may not be the fire breathing DF engine I was thinking it was from the VF designation - there's no "-DF" following it after all. One response posted on RCU from customer support regarding this engine said it was a relatively mildly timed engine, pretty much a .40 FSR with rear exhaust.

If that is the case, then it should pull props more suited to the Laser Arrow with authority. My comments were aimed at purpose-designed DF engines.

MJD