I got 6 flights on th Feibao Swordfish with the K260 yesterday. The spool up is not as fast as the K210 but it reached ~113000 to 114000 rpm without a problem. Stressed it as much as the airframe can. Clocked it at 199.99 mph. It was good to see some high speed rifle rolls in this 122" jet. Surprisingly with throttle management - I got the same time as I did with K210.
The idle thrust was a small issue with the K260 on the swordfish - I have maxed out crow already and it still was not slowing down as much as it did with the K210.
All in all - very happy - now to put it in the Mephisto.