I finished my Extra 300s 40 about a week ago and have already put around 30 flights on it. I love this airplane. I went from a trainer to this plane (despite recommendations to the contrary from folks at my field), and I don't really see myself ever returning to the trainer. The Extra takes a bit of getting used to the first few flights, but once you get used to using more rudder on takeoffs and the required landing speed, it's a joy to fly.

My only problem is that I underpowered my plane. I read posts about the 46FX being a bit underpowered so I opted to use an OS 50SX. Although this engine puts out 20% more HP than the 46FX (according to OS), I still feel underpowered. The plane definitely does not have unlimited vertical performance with this powerplant. Yesterday, I spent some time making thrust measurements with various props. My plane weighs in at 6lbs 10oz, and the most thrust I was able to achieve was just under 4lbs. I am thinking seriously about buying a 4-stroke 91 to replace the 50SX engine. Based on the comments in this thread, it sounds like the 91 will be just the ticket to provide unlimited vertical.

Quick question, how well does the 91 (OS or Saito) fit under the cowl?

BTW, my wheel pants are already beginning to crack from a couple of semi-hard landings. I found a guy on the web that makes custom fiberglass wheel pants and cowls for this ARF (and a number of other ARFs too). I imagine I'll be ordering them soon.

Dave