Hi Robert,
Catching up on this thread and just saw your post.

My Allure at the 2015 NAT was setup with a V3 with Neu 1512-2Y (1380 KV), 10.15 gear, 22x20F and 21.5x20R, and of course Throttle Tech. I round the tips of the props to mimic the shape of the APCs, and trim 1/2" diameter off the rear prop. I think this slightly reduces noise on the sound meter and improves the sound quality in the air...very minor/subtle improvements.

If you check post 1343, my prior testing showed the 22x22F/R is the fastest setup....and not surprising, it is the highest current draw. The 20" props are fast, almost as fast in a straight line. Where the 22x22 props are more noticeably faster (for me) is in maneuvers like climbing loop sections with integrated rolling, or upline snaps.

While not specifically related to 1 particular power system setup, if you keep the plane just a couple meters closer in, you effectively gain quite a bit of pace. I have found it is easier to fly close in with windy conditions with the Contra because the pace of the downlines do not look too rushed close in even when using higher pitched faster setups.