My advice is to make a backup copy of it. After fiddling with the colors and the fonts on my blind, I got called away from my computer and when I came back, half the blind was gone! So I had to pick through all the images and put them back in the correct places, and fill in the extra instructions, etc, HUGE PITA! Would have been even worse if I hadn't had the backup copy (not as much of the details finished in the backup copy, but still had the fonts left and some of the system colors so it was just a lot of copy work). This is not the first time something messed up while working on it, but again, fortunately, at THAT time I had an earlier version uploaded to Mediafire for WIP testers.
Any venture that consumes this amount of time should have backup copies stored not only on your computer, but uploaded somewhere online just in case...just my 2 cents worth.
The blind is AWESOME so far. I can't wait to see it finished! 
