T Perk...a friend of mine has the KT 120 in his Excalibur and it won’t slow down with that motor either. He has lowered the idle rpm by about 4K and turned out both rudders for more drag and it’s still a challenge. The plane will roll by itself even on his reduced idle. It’s too much motor for the turbinator. I have a Jetcat P70 in mine and it flys great but a 100 size motor would be perfect.