Database for mast & plate

I thought that Axis makes a very big mast extrusion. One normal one and one bigger. It might be worth exploring if we have strength issues. In the mean time I will go with Slingshot and Gong. Does anyone have this big Axis Mast?
Also what lengths are people using? I was going to go with the Slingshot 30" mast that I never use for kiting. It is only good for travelling because it fits easily in a 36" duffel.