Charles the Cox Conquest .15 was a pretty impressive engine a few years back. Can,t tell you much about it since I was not a user but I can tell you RJL has proprietary rights currantly and have produced new batchs periodically. Don,t have the website at hand but but they advertise in most mags frequently and are located in Duarte, Ca. Not sure but the engine may have a throttle carb available.

John