A3 is too small
You are so right about that. I just got back from Office Depot. They wee very nice and tried to help, offering samples of their capabilities. 24" stock is too small. They told me that their store in Paducah has a 36" wide printer. That just may be readable. I plan to have one made. For $4, what do I have to lose. From their, if I have a section that I just can't read, I will blow it up to 200% and print the area I need. I would do the whole drawing at 200%, but I couldn't get the accuracy that I needed in my effort to section it, as the "size to fit" print function kept altering the magnification, ever so slightly, but enough to make the lines quite difficult to trace. I can certainly use my 19" PC flat screen. At 200% it is very readable...
Tom