Well, I finally got to swapping out the 2200Kv motor for the 1520. Can't run it though since the weather here is so crappy. It's raining, windy and cold.
Here are some pics:
1515 side by side with the 1520
Here are my spare motors:
From left to right:
1512 1800Kv, 1515 2200Kv, 1717 1500Kv air version, 1518 1800Kv, 1717 1580Kv car version, 1520 1600Kv