the way to stop snapping the end off is to put a little cut wid the water fed cutter on the opposite side you start on. i have a snap cutter capable of doing 600 mm tiles, you need one of these! there is no way on this earth you will cut a 600 mm tile with the water fed cutter properly and straight come to think of it. you will find you are trapping the blade with the tile and eventually burn the motor out. by the look of the pic it only has a small blade, you need one with a blade with a diameter of about 200mm, 8". if you want to talk my msn details are v16ean@hotmail.co.uk. if you are struggling and wasting tiles its gonna end up costing you more than it would to pay for a specialist to do it, ive seen this all before ends up costing double than what it should. im not having a go just saying what goes on. despite what every one thinks tiling is not a DIY job(within boudaries) of course. look forward to speaking on msn ill give you all the help i can. where abouts are you at?