Others have already answered your question - and it looks like good advice - but I couldn't help thinking 75 fields is an awful lot to have on one form. Couldn't you split each form into 5 or 6, saving the inputs as you go. If the user gets bored part-way through, they could come back later and pick up where they left off. I'm kinda thinking CGI forms here, which may be completely irrelevant to your application, so feel free to ignore my rambling.