[TJ Mason]

I buy them pre-cut, and take them into Aardvark if they need cutting again.

I once converted an old set of XX75s to something resembling Platinum Plus, and used a mini tube cutter to remove the taper swage end. It wasn't possible to be very precise, despite my most careful efforts. There was a spread of about 2 mm between the arrow lengths. Don't use a tube cutter on alu-carbons - the carbon will crumble away from the aluminium.