I believe that Matt Chapman has one in his Cap. I think the -580 has 320 or 330 hp and was probably designed for people that had aerobatic planes to have a certified engine that was lightweight and did not have to have mods to put out 320 or 330 hp, which seems to be the magic number these days. Are there any legal problems with having an engine sent to Demars or Barret for some mods, since you have to take it out of registry?