yeah it flys very well and I cant really find any bad habbits. It does require ALOT of rudder to get nice coordinated tuens happening but that adds to the fun and challange.
No, I did not use the wood cowl blanks. I cant see any need to use them. Just allow the air to excit in the rear and it will keep everything nice and cool. I might add the sound system to give that REAL radial sound in the air ( weight is still a concern ) and if so will fill the cowl with speakers.
I also got the new Eagle Tree stabiliser ( for a drone project ) but might try it on the R3