Don't know anything about the smaller engines but there are three of the GMS 1.20 engines at our field. The owners just love them, they might not be the most powerful 1.20's around but they are certainly the most user friendly. They start easy and don't quit till you turn them off, they don't guzzle fuel and they run real good on 5% nitro. They use the same muffler as the Webra 1.20

RJ