I just got a new Excalibur 2000, 100cm aluminim and I was wondering about the shaft guide. Should I place it in the middle or closer to the front? Also I have a really hard time loading it. I have to use all my strength possible to just get it to the first notch on the shaft and that's on dry land! I can't imagine doing it in the water. So is there any kind of exercises you guys do to make loading easier, or do my sling need to be broken in? Thanks.