I just shaved with it today and there were no issues whatsoever! It shaved like a dream! I cleaned her up a bit but it doesn't need any tune up. I'm still dealing with irritation using a very mild Schick Krona but other than that, great shave!Great find! I have an F1 and it's in my daily rotation. I haven't read the whole thread to see if you like it but if it doesn't give you great shaves it's very possible it just needs a tune up. Given how you acquired it it may have been knocked out of whack but looking at it I'd bet it's in excellent shave shape.