Finally used my Xmas pressie Dremmel in anger. Had to fit about eight IKEA aluminium Venetian blinds for a lady. All had to be cut to width.
Nightmare of a job with a hacksaw, the ally square 'U' section was so flimsy even trying to hold it down whilst cutting it caused it to deform. First one took ages.
Nipped home for the Dremmel. Bloody brilliant. Used up half a dozen cutting discs, but the time saved & quality of cut was amazing.
Well worth the money.