May I suggest an alternative approach I've taken in the past with DLA application forms (although I've only done two, because the second got indefinite) and AA applications. I've also used it with applications for other benefits including IB and ESA. Perhaps Monic would be kind enough to say whether she agrees with this approach.
First, look up the criteria, then copy and paste them into a word processing document. You may want to make two copies, one to save and one to work with.
This is because my simple rule when applying for any benefit is:-
Answer the questions they should have asked, not just those that they did ask.
Then on the form, in any box where you're not certain, or you don't think there's enough space, or you think the question won't enable you to give the right answer, write 'see attached' and put a longer answer as an appendix/supplement.
Make sure the replies you put are worded in such a way as to press the right buttons. Let me take a fictional example. Let us say they ask "Do you have difficulty skipping?" Let us suppose the criteria say you get 10 points if you can only skip on one leg and only on Tuesdays, 5 points if you can skip on only one leg or only on Tuesdays, and 0 points if you can skip on both legs or on a day other than Tuesdays. If you simply wrote "I find it very difficult skipping because I find I can't always use both legs and can't manage it every day," you're not hitting the right buttons, but if you wrote "I find it very difficult skipping because I only manage it on Tuesday mornings and I can't manage to use my right leg for skipping, so I can only skip on one leg," you'd hit the jackpot.
If you find that none of the questions on the form (other than an any other information type box) gives you enough scope to tell them all that you want to tell them to ensure they know you meet the criteria, add a further section to your appendix. Whether you do it as an intro or as a postscript is a matter of preference.
Then, when you've finished, put the headings you suggest, less the question replied to, which you put as a sub-heading where relevant, plus a page number on each page including the form itself. That's to say that you start your numbering on your covering letter (if you're enclosing one) then continue on their form (and I haven't seen a DLA form for ages but some DWP forms don't number the cover page but you number it so that your page 3 might be their page 1)
Your numbering should include the final number so they've no excuse for 'losing' the last part of it and pretending they didn't know you'd sent it.
So the numbering goes, e.g. P1 of 40, P2 of 40 or whatever, with the final page labelled 'last' as well.
I've just dug out my copy of my last DLA application - just under 1cm thick.
