The 23x8 should be ok for break in. With the engine on my Ultimate I used a 22x8 bolly ($34 "from memory" from howie) I did change to a 23x8 bolly after break in and it liked it alot. But I busted it after a nose over on landing. I've gone back to a 22x8 bolly which seems better suited to 3d flying (spools up faster). Try not to hover for the first few flights but after a few flight you can but keep them short. I didn't hover for more than a few seconds until about the 5th litre of fuel. Also if you are flying IMAc or pattern type stuff use different throttle setting (not just on and off) use the midrange as well to help bed the ring.

If you haven't already tune for max rpm on the high needle and back off 200-300 rpm, then set the low end for good tranistion. Once you do that you should be close. As you run more fuel through just tweek booth needle slowly until the midrange burble is gone. Then you should be sweet and have a very reliable engine.. Love me DA....