During my Yom Tov Torah reading, I noticed that two Sifrei Torah had seams that seemed (OK, a bit of a pun intended, here ;-) a bit loose. So, I have a few questions regarding some of the requirements regarding fixing the two sheets:
Is there a minimal amount of margin space needed at the seam? Can two sheets overlap when stitching, and if so, is there a maximum or minimum amount?
Can the corner of a sheet be cut completely (in its margin, of course) if it is frayed or if it makes restitching easier?
If a strip of parchment is cut, does it have any kedushah or can it be discarded?