the biggest mistake with the Nextar it seems is people were hammering the throttle down on take off resulting in the veer off, I really never had any trouble with this plane other than the landing gear after a crash and that was a easy fix when using some common sense.

the offset was intentional in the design to make it easy for beginners to control it.

seems like a good amount of people are concerned with the offset of the engine but there are allot of arf's that incorporate it into there design including several of my Hangar-9 warbirds I don't see any problem with it other than over aggressive throttle up, a nice smooth stick results in a easy graceful take off.