Took me bloody ages...and a few cups of tea.
Best advice is to cover everything you can with cardboard....one slip and you could be halfway thru a brake line.
I got thru 2 blades on a big hacksaw...the junior ones handle was just too dificult to grip comfortably for me. Well worth it in the end.
Oh make sure to start it when the cut is finished. Sounds sooooo good i was tempted to ride it like that for a few days.