You are right Solentlife, sorry. I was going off the one I just built (Calmato) The CG should normally be just in front of the Mains. I always try to land on the mains first. It just becomes natural after you do it for a while. With my Trojan it is very easy to do. I haven't flown the Calmato yet. It may be harder to get right as I have a very big heavy engine in it and it is quite nose heavy. Trying to decide it I should put some weight in the tail as I can't move the battery packs back any further. I have some sheet lead I can play with.