Hi! That's a really well-done website, very intuitive and clear. My first question would be, who would need this? Most items have the manual delivered. And most just throw it in the bin. Would you expand on the type of PDF that could be collected? You could easily add more categories, for agriculture as an example ;D Maybe something focused on academics for schools/universities etc? Some categories are great and could be a great source of information for students, interns, etc. Did you try to approach those types of establishments? if your product ain't growing, it's either you haven't found the right place to share about it or people aren't seeing any type of benefits on using it. You got to ask yourself, how that would make the difference between a person having access to your website, and someone following a given course or instructions from somebody, with the already available tools at hand. There are videos of people renovating engines or making reviews, I am just throwing ideas right there but what If you could try to find people who work within those engines, etc, or go to the assembly lines, down to the store for some tools and record it all? Sometimes people want the visual and why not, just get to know more before about the product before they dive into a PDF file. That could even be a great way to make people buy those things and that would be an opportunity to close some deals with some retailers, who knows ;D Great concept btw, if your website could get nearly all the PDFs of all the major industries, it could become a reference. I spent days if not weeks to find the appropriate ones for some work I had to do. Hope it helps! ;D Cheers.