The 18cc Featherlite is light, but not very powerful. The Echo would be much better. I don't think the 16cc Echo has been made for quite some time, so it may be hard to find used. If I remember correctly it was marketed with various numbers from GT-1000 to 1600.... same engine. The 21 to 25cc Echos weigh only slightly more than the 16cc but have more power. The 16cc Echo would be nice on Gas/Glow, as it would help keep the weight down as much as possible, and increase the power a little. I sure like the Echo engines myself...

AV8TOR