As far extending the ball lengths there is no need to do that, On the sevo cases rubbing just block the servo so it extends more out from the frames. Your rod will not be exactly linear however I have 3 benzins and had the same issues when I built them. I spoke in length to Joe Howard at East Coast Scale Helicopters and he assured me there would be no problem. Like I said I have three Benzins 2 pod and boom and one in a carbon airwolf and all fly as good as you could ever want them to with no issues created by the set up