Yes, you will need a darning or FM foot. The 301 is slant shank machine so a regular short shank won't fit. I purchased mine from April1930sshop for $18.95 and no shipping. My LQS likes it better than the one they sell. I have only done lap quilts, but some have been 70 by 80 inches. A 7 1/4" or 7 1/2" harp is only normal size, but I haven't had any trouble. I think the curved pillar helps a little. I like my machines flush in a desk or cabinet. I can't sew with a machine sitting above table level. I know it's all in what I'm accustomed to. First, I used my serger table with the extension that raises on the left side. Now it's in a Kenmore cabinet from Salvation Army for $1. Looks normal. No one knows it's resting on a cut up 2 by 4. My chances of finding a 301 cabinet in the north country aren't good. Actually, I know where there is one in Indianapolis and my son sometimes travels that way.
Miss AnnieRose is worth every penny of the $61 I paid for her. The seller had replaced the electric cord and thought he had cleaned and serviced her. Oiled, maybe, cleaned, not. But they are easy machines to service yourself - also light to ship unless there's a case involved. If you don't get a manual, sewclassic.com has a free one.