The Precision Eagle is indeed a very good engine. I have an old 4.4. Could be based on Sachs or Husky, depending on displacement. They are a bit heavier than today's r/c specific engines but in line with the older Brison engines. The P.E. hub is fairly large and, if someone wanted to invest the time, could be shaved to reduce weight further. If the price is right it's a definate buy.