cutting long side of glass

[Trinity]

I need to cut 70mm off the long length of an 800 x 1100 Clarity sheet to achieve 730 x 920. From those who do it regularly would you place a batten against it or simply use the normal hand pressure push.Would you also apply a bit more pressure on the score.
Thanks

[Trinity]

short sharp application of pressure did it.
More a case of the increased cost of glass gave me the eebeejeebies.

[Roboframer]

Did you cut the other side first, so you had a 920mm side to cut 70mm off?

Do you use a sheet of mountboard behind the glass (I'm assuming your using a wall mounted cutter)? I do, to protect from scratches, but it also cushions the snap and makes these long cuts a lot less scary.

[Trinity]

I did cut the longer length down to 920 first but didn't put a backing sheet behind it - I'll do that in the future though. I slid the glass across gingerly to avoid scratching, but see exactly where you're coming from.
Do you leave a backing sheet in all the time, or just for the more expensive glass.

[Roboframer]

All the time, it's just a nicer 'snap' and anyway, you should have to slightly adjust the pressure on the glass wheel for it so you may as well leave it in rather than keep adjusting that.

[Tudor Rose]

We also use a backing sheet for cutting coated glass - Clarity, Tru Vue, that sort of thing. Don't bother with ordinary float glass.

[prospero]

I've found that 'specialist' glasses tend to cut better than standard float. the ones I've used are a tad thicker.

The general rule of sod is that if you have only one sheet you will break it. If you have a potential second chance you won't.

I once had to shave about 1/2" off the long side of a 4ft sheet of Museum. I cut it by hand and took about two days to work up the courage.

[Graysalchemy]

I once cut about 30 sheets of museum glass to size. I just got on with it and ignored the fact there was 3k of glass.