Maurer said early-position diesel customers are naturally disappointed that they won't be getting their airplanes when they expected but most have been understanding. "Anybody that's acquiring leading-edge technology expects and is very tolerant of teething problems as long as they're dealt with effectively," Maurer said. He said Diamond is committed to the diesel program because the company believes the time is coming when 100LL will be phased out. "The future in fuel is jet fuel or mogas," he said. "We're looking to that future but we're not going to go into it blindly."