Looks good ct. Nice detail there.
Scaling is something I struggle with. All printers have different margins, so what I do is simply lay the parts out on an 8.5x11" sheet and then say that they should be printed with no margins along the edges in order to maintain scale. 10.75 might be a wee bit close, I think Canonicus is 10.7 or so and I thought that was about the outer limit of what could safely be fit onto a letter sheet. You could try and see, it might work. Lay it all out and print it off and see what happens. My best advice is that trial and error is the best way to figure it out. Good luck.