The US 41 pulls this plane very well for sport flying. Watch letting it get nose heavy. I had to place the firewall 1 1/2" farther back than the plans to allow the the 4 1/2 pound engine. It balanced very nicely in that configuration.
I sheeted the tail with 1/16 balsa so it didn't need the external braces. About 100 flights and other than one hard landing which knocked the gear off, it's been great.

Dave