I ran my Extech .21 for the first time last weekend. I was very pleased with the power and performance. 0 flameouts and didn't have to touch a tuning screw all day, after the main 182 degrees

Coming from electric racing and still learning this nitro stuff it is very important to me to have motor that runs correctly without a bunch of jacking around. So far it looks like the extech will be as good if not better than my GRP in that department.