Ok

seven amswers

1.) carbon masts are lighter

2.) mast hardware for carbon masts does not have to weigh more than for aluminium

3.)I don't see a question to answer, you need to put it in simpler terms

4.) see 3)

5.)carbon fibre masts are very easy to repair.

6.) No-one said that carbon masts will be cheaper than aluminium, they are getting cheaper all the time, but will probably always cost more because they take longer to make, but on a $13000 boat an extra few $100 is not that much, there is no shortage of aluminium expected, but there is no shortage of wood either, but we don't have wooden masts anymore because aluminium is better

7.)No, the tip weight is measured by placing the mast horizontally, supporting the base, then weighing the tip, to achieve the same tip weight the carbon masts will be still end up lighter, but to lift the tip clear of the water will be the same for all masts of the same tip weight.

And to answer Mary's point, the only reason to add the weight is to make all the masts soak up the same energy when the mast is wobbling about.