|End points marked on inner border|
I also mark the mid-point, then pin the border to the edge of the quilt, starting with the middle and ends, then working the space in between. In theory it should fit.
If it is grossly off, then I know I have made a mistake in one of my calculations. If it is off 1/4" or less on either end, I may let it slide. (Yes, I know my quilt won't be exactly square, but I'm not entering any contests.)
Nothing is worse than cutting your border, only to discover it is too short!
And that's my tip for the second Tuesday in February.
Keep warm and quilt on.
PS: I'm glad I did it this way because I was an inch off. I had just enough inner border.