Thought DP cancilled production on these some time ago. Had one with Irving 53, pulled it right along. I bought it before my extra 300 shook itself apart in a very strange experience. Fellow super pilot was flying at the time, wings flaped like a bird, snapped in bang. Salvaged motor and gear, gave remains away. The wing tube and mountings were intact and broken. Have not had a DP product since, heard mine was not the only one. Would not consider the bype as one of my better flying aircraft!