I found that drilling new holes between the first and second hole, was ideal. The front end was not too light and it still did great in the deep pow. If all you did was deep pow and never rode trails or climbed hard packed hills, then letting the limiter all the way could work. But most people don't have those conditions. Letting the limiter all the way out, was dangerous as I recall, since you lose control of the sleds direction the second the skiis pop off of the ground. Shortening the limiter strap makes the track trench faster because you have less weight on the track and more weight on the front skiis.
Powder pros also keep the front end lower because they do not float as high as say the dual keel skiis. The lower the front end, the lower the attack angle, the better the track handles the powder. High floatation skiis cause the track to trench sooner, by pointing the sled's nose up into the sky so that you are always climbing a hill even though you are on level terrain.