The OS ran really strong but it didn’t pull the Kaos around at super ballistic speed like I prefer. Within a month of flying I pulled out the OS and replaced it with a more powerful Irvine 53 ABC. It really came alive with the 53 and has been much fun to fly. Here is a You Tube clip
http://www.youtube.com/watch?v=9Zkt6pXu0rk&feature=plcp with Irvine 53 power. At that point I reconsidered what I thought about the Kaos 40 and found another kit for backup on the auction site.
To be continued…..