If you're good at web hosting, scripting and a little bit of coding, you could probably replicate it on your own server. But, other than to PDF each section, which looks kinda horrible, online access is the most straightforward method of using it.
And, yes, they were scanned with a potato.
I haven't seen the latest drawings, but, colorizing parts of black and white drawings or lower res 3D renderings turns out what results we got. I find they're quite fine if you drill down to follow where you are.