I don't know what Myrle did in terms of refinement, but this mount is amazing. I put in the newest Hyde engine mount last August- right after the NATS. 35 gallons of 20 percent heli Cool Power and I just took the 170 engine out to be proactive. I have never gone that far in an engine before with zero maintenance, not even adjusting the needle valve. Just fuel and fly, gallon after gallon. Also 35 gallons with no leaking header pipe (normally I have needed new O rings after every 4 to 5 gallons because I am using the old Central Hobbies aluminum headers). This has been a good run. Now I have the YS 175 back in. My hat is off to his innovation and refinement to his design for optimum performance, airframe and engine life.

Don