It's not the quantity, but the quality that matters. Just make sure that you have solid evidence of all the requested documents as listed in the visa booklet. I think that when you are from a low-risk country, the CO will just perform a check if all the documents are there and if the required documents are to their satisfaction... then it's just a stamp of approval.actually, it's just 40-ish documents. I attached some categories with the same attachment such as, evidence of identity, I put passport, evidence of the name, with passport as well.
I put all evidence including my custom photo album which had 40 pages with 3 photos each page. Is that too much?