I just bought a Stanley 71, not complete, as it is missing a fence, but it has the shoe, and a 1/2" spearpoint blade. The Lee Valley blades will fit it just fine.
Had been trimming tenons with a Stanley #90 bullnose and a Veritas medium shoulder rabbet plane, but this should give a little more precision. Watch Chris Schwartz show how to sharpen router blades using waterstones and a thin steel ruler. My ruler is from Harbor Freight. Rob Cosman is a fan of the ruler method of sharpening, and I saw the trick first on one of his YouTube vids.