cheap-ass angle grinder
or a slightly better one by draper
there are a huge range of discs and accessories (more variety at screwfix or on ebay)... will look/sound more impressive when cutting steel than carbon, which it will go through like a hot knife through butter. The more you can support the carbon while cutting/shaping the less it will splinter and compromise the structure. You might be able to find a broomstick or something that fits inside the tubing that you can sort of cut against when working the carbon. I have also seen that some people say to tape the edge you are working on.
On the safety side, it never hurts to wear a pair of cheap sunglasses to keep shit from getting in your eyes and thick rigger gloves (as cheap as £1!), though obviously more thorough protection is the recommended thing.
cheap-ass angle grinder
or a slightly better one by draper
there are a huge range of discs and accessories (more variety at screwfix or on ebay)... will look/sound more impressive when cutting steel than carbon, which it will go through like a hot knife through butter. The more you can support the carbon while cutting/shaping the less it will splinter and compromise the structure. You might be able to find a broomstick or something that fits inside the tubing that you can sort of cut against when working the carbon. I have also seen that some people say to tape the edge you are working on.
On the safety side, it never hurts to wear a pair of cheap sunglasses to keep shit from getting in your eyes and thick rigger gloves (as cheap as £1!), though obviously more thorough protection is the recommended thing.