If you live in the US (and possibly other countries) and are blind, you can probably get See3D to model things and print them for you for free.

http://see3d.org/

I have always wondered how blind people "visualize" (I can't think of a better term) large scale objects.

I've no idea. But flipside, I know quite a few sighted people who can't walk around a rectangular block without losing track of which way north is. Or can't visualize that (say) their master bedroom closet backs up to their kitchen. Or other facepalm-worthy visualization failings.

I have never been able to use cardinal directions but I am very good at mental visualization and manipulation of 3d objects

> without losing track of which way north is.

I blame my childhood. Everyone always said the Pacific Ocean is to the west. So naturally the direction I went to go to the beach on the pacific ocean should be West. Especially when the north/south freeway crosses the street I take to the beach at a pretty good angle (well it's more like 45 degrees). Turns out I actually go south to go to the beach, the freeway is roughly parallel to the coast and north/south freeways sometimes travel due east/west and I have a real hard time with cardinal directions, and even if I understand where the directions are when outside, when I enter a building, especially if I go up stairs or an elevator, my sense of where the cardinal directions from inside the building is likely to be way off.

Thankfully, there's not a big impact from not knowing where room walls are relative to each other. :P

> Thankfully, there's not a big impact from not knowing where room walls are relative to...

Let me tell you about the friend-of-friend, who was cutting holes in his dining room wall to install [whatever], oblivious to the bathroom on the other side, and the water pipes for that bathroom...

Don't they make special anchors for mounting your TV on PVC sewer pipes? Should be fine. ;)

Similarly, I live in Seattle with hills everywhere, but the main path I used to go uphill was Southbound. But on maps, up is always North. I haven't recovered since!