hi Andrew,just finishing my new Carden Extra...i have everything installed ..8611's on all surfaces...2 per aileron,3 on the rudder and 1ea on per elevator.All running on 6 volts...question,will i be OK with one servo per elevator half,or should i go with the standard 2???I will primarily be flying IMAC..with little 3D...I am flying Advanced and will proably move up to Unlimited by the end of the year,Thanks,Joe