I bought the coupler from Tower Hobbies - it is made for that engine. I bought two and used a regular flex pipe normally used for tuned pipes. I still need to break in the engine. I've had it running with that configuration and I've had no problems. I did have to tear out the original engine mount and make my own using hardwood and plywood. I also moved the throttle servo back behind the firewall.

My problem is I have a full time job and too many hobbies! I also need to complete an F-117 EDF jet that has retracts - really cool! And Sunday I'm buying a Tamiya 1/16 Tiger 1 tank for only 4100! I have an extra Spread Spetrum receiver I can use with my programmable TX.

Take care!

Bert