I have read quite a bit about the enforcer but have not flown one- The only one I saw fly actually had a 4 stroke on it and it was about 70 mph... It landed at about 5 mph, and did very tight loops, fast rolls etc. the guy had it set-up for torque not speed-
The best result I think is from adding a Byron DF unit (Engine, fan, shroud, pipe etc.) they are appropriately called Byro-Enforcers and seem impressive-
Quickees like the Viper or Predator, prop-jets like the Patriot or DC F-20 are others I would recommend--
